This is a tiny tweak to replace some top level if clauses with guard clauses in `FutureBuilder`. I find the resultant code much more readable, but this is a matter of taste and I didn't see any info one way or another on it in the style guide so let me know if this is not to your all's preference.

Fix `SearchAnchor`'s search view isn't updated when the theme changes & widgets inside the search view do not inherit local themes (#132749)

fixes [SearchAnchor (search view) UI glitch on platform brightness changes](https://github.com/flutter/flutter/issues/131835)
fixes [Search view widgets cannot inherit local themes](https://github.com/flutter/flutter/issues/132741) 

### Description

- This fixes an issue where the `SearchAnchor`'s search view isn't updated when the platform brightness changes.
- Fixes an issue where widgets inside the search view cannot use local themes

### Actual Results

`SearchAnchor` currently passed both global and local themes on the search view popup pushing and it uses anchor. button's context to look up the theme.

![search_view drawio (1)](https://github.com/flutter/flutter/assets/48603081/b5317fb1-ee73-461c-a119-f2a1e29f5909)

As a result, when the platform changes and the search view is rebuilt, it cannot use the updated theme.

https://github.com/flutter/flutter/assets/48603081/2f1ebe74-e7d5-4ef3-b97c-a741c3d68964

### Expected Results

Similar to `PopupMenuButton`, the theme should be located in the search view so that when the platform brightness is updated and the search view is rebuilt it can use the updated theme.

![search_view drawio](https://github.com/flutter/flutter/assets/48603081/4e48c0cb-a558-4de6-9865-5f51981a343f)

https://github.com/flutter/flutter/assets/48603081/d8d85982-c661-4cac-83e8-0488b1d93daf

However, the search view's context cannot access local themes so I added support for `InheritedTheme`, which fixes the local. theme issue for both the search view and widgets inside the search view.

### When using local themes for the `SearchAnchor`'s search view and widgets inside the view.

### Before

![Screenshot 2023-08-17 at 15 54 02](https://github.com/flutter/flutter/assets/48603081/dec18ba3-9f01-4706-987a-eb2fd4afb180)

### After
![Screenshot 2023-08-17 at 15 55 15](https://github.com/flutter/flutter/assets/48603081/13f2797a-7f70-43b5-bc56-7971cf76a61d)

This build runs for over and hour and it does not need to run on presubmit or release candidate branches.

https://github.com/flutter/packages/compare/619af75f7966...21c2ebb39c07

2023-09-26 43054281+camsim99@users.noreply.github.com [Android] Add new tasks for subset of tests to run API 33 (flutter/packages#4974)
2023-09-26 stuartmorgan@google.com [video_player] Update iOS prefixes (flutter/packages#4994)
2023-09-26 srawlins@google.com [go_router] Fix @tool directive with missing @end-tool (flutter/packages#4998)
2023-09-26 84124091+opxdelwin@users.noreply.github.com [GoRouter] option to override initial route set by platform  (flutter/packages#4717)
2023-09-26 ditman@gmail.com [video_player] Ensures autoplay is false on the web. (flutter/packages#4961)
2023-09-26 34871572+gmackall@users.noreply.github.com [camera_android] Downgrade to AGP 7.3.0 to fix build_alll_packages test failures (flutter/packages#4997)

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<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Linux_pixel_7pro hello_world_impeller"
}
-->
The test has been passing for [50 consecutive
runs](https://data.corp.google.com/sites/flutter_infra_metrics_datasite/flutter_check_test_flakiness_status_dashboard/?p=BUILDER_NAME:%22Linux_pixel_7pro%20hello_world_impeller%22).
This test can be marked as unflaky.

Support for FFI calls with `@Native external` functions through Native assets on Windows. This enables bundling native code without any build-system boilerplate code.

For more info see:

* https://github.com/flutter/flutter/issues/129757

### Implementation details for Windows.

Mainly follows the design of https://github.com/flutter/flutter/pull/134031.

Specifically for Windows in this PR is the logic for finding the compiler `cl.exe` and environment variables that contain the paths to the Windows headers `vcvars.bat` based on `vswhere.exe`.

Resolves #81831.

The PR improves the `config` command in below ways:
- Does not print the settings in usages or other options.
- Adds the `--list` flag to print the full settings list.
- Separates usages for settings and analytics.
- Prints the restart tip when clearing features.

https://github.com/flutter/engine/compare/0a8ad236e4af...f70f65f7a622

2023-09-27 skia-flutter-autoroll@skia.org Roll Skia from d1215b38667c to 76aecbaea259 (1 revision) (flutter/engine#46309)
2023-09-27 skia-flutter-autoroll@skia.org Roll Skia from bc4f22353590 to d1215b38667c (4 revisions) (flutter/engine#46306)
2023-09-26 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from a56c8yPp4DDlj_Qbl... to Lg6FR6iDnZeV6y-E8... (flutter/engine#46302)
2023-09-26 ychris@google.com [ios] Fix app extension not able to find assets from unloaded bundle (flutter/engine#46283)
2023-09-26 leroux_bruno@yahoo.fr [Android] Fix enableSuggestions set to false not honored (flutter/engine#46037)

Also rolling transitive DEPS:
  fuchsia/sdk/core/linux-amd64 from a56c8yPp4DDl to Lg6FR6iDnZeV

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https://github.com/flutter/engine/compare/acdb364a42d5...0a8ad236e4af

2023-09-26 1961493+harryterkelsen@users.noreply.github.com [canvaskit] Use DirectionalLight_Shadow flag for drawing shadows (flutter/engine#46292)
2023-09-26 30870216+gaaclarke@users.noreply.github.com [Impeller] fixes behavior for blurred rounded rect clear (flutter/engine#46167)
2023-09-26 skia-flutter-autoroll@skia.org Roll Skia from dd6a4e3655fc to bc4f22353590 (6 revisions) (flutter/engine#46299)
2023-09-26 30870216+gaaclarke@users.noreply.github.com Clean up the docstring for ColorFilter.matrix (flutter/engine#46298)
2023-09-26 49699333+dependabot[bot]@users.noreply.github.com Bump uuid from 4.0.0 to 4.1.0 in /lib/web_ui (flutter/engine#46293)

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Reverts flutter/flutter#135255

This broke Google Testing, and requires an internal patch before relanding.

[documentation] remove repeated "For example," in RenderSliverEdgeInsetsPadding documentation (#135297)

There was a repeated "For example," in the documentation of `RenderSliverEdgeInsetsPadding`. This PR fix this.

Fixes https://github.com/flutter/flutter/issues/135461

Fixes https://github.com/flutter/flutter/issues/133089

This allows more than one ParentDataWidget to write to the ParentData of a child render object. Previously only one was allowed. There are some rules though:
1. Only one of a given type of `ParentDataWidget` can write to the `ParentData` of a given child.
  a. For example, 2 `Positioned` widgets wrapping a child of a `Stack` would not be allowed, as only one of type `Positioned` can contribute data.

2. The type of `ParentData` **must** be compatible with all of the `ParentDataWidget`s that want to contribute data.
  a. For example, `TwoDimensionalViewportParentData` mixes in the `KeepAliveParentDataMixin`. So the `ParentData` of a given child would be compatible with the `KeepAlive` `ParentDataWidget`, as well as another `ParentDataWidget` that writes `TwoDimensionalViewportParentData` (or a subclass of `TwoDimensionalViewportParentData` - This was the motivation for this change, where a `ParentDataWidget` is being used in `TableView` with the parent data type being a subclass of `TwoDimensionalViewportParentData`.)

During a long press, on native iOS the context menu does not show until the long press has ended. The handles are shown immediately when the long press begins. This is true for static and editable text.

For static text on Android, the context menu appears when the long press is initiated, but the handles do not appear until the long press has ended. For editable text on Android, the context menu does not appear until the long press ended, and the handles also do not appear until the end.

For both platforms in editable/static contexts the context menu does not show while doing a long press drag.

I think the behavior where the context menu is not shown until the long press ends makes the most sense even though Android varies in this depending on the context. The user is not able to react to the context menu until the long press has ended.

Other details:
On a windows touch screen device the context menu does not show up until the long press ends in editable/static text contexts. On a long press hold it selects the word on drag start as well as popping up the selection handles (static text).

Co-authored-by: Christopher Fujino <fujino@google.com>

https://github.com/flutter/engine/compare/7b989a28514e...acdb364a42d5

2023-09-26 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from we5owZaebdO_3kyjz... to OMrTgAfDg9PKXTzq0... (flutter/engine#46294)
2023-09-26 skia-flutter-autoroll@skia.org Roll Skia from 8264a73430de to dd6a4e3655fc (2 revisions) (flutter/engine#46291)

Also rolling transitive DEPS:
  fuchsia/sdk/core/mac-amd64 from we5owZaebdO_ to OMrTgAfDg9PK

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Part of: https://github.com/flutter/flutter/issues/129806

Test runs kicked off using `led`:
* Compile tests
    * ✅ [flutter_gallery_win_desktop__compile](https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/loicsharma_google.com/a23b73ca25cc56309a725c77be0107aaa1f2d09b1f41f1cc04276b85fac34366/+/build.proto?server=chromium-swarm.appspot.com&fbclid=IwAR2Yv8iS9YbTxMZKS2i5zmAz9E8FCNjW6waLq4e8HwtaFtMlapl66UHf73w)
* Start up tests
    * ✅ [windows_startup_test](https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/loicsharma_google.com/e615b28993c8b4fcb90e2d52226f9e4d9478850bee67f1f19a88d37e767dcfc2/+/build.proto?server=chromium-swarm.appspot.com&fbclid=IwAR1YtPTpAr6FRq71fy392orp6PO8t9jN8n-mpWvlDF0xRnnOsq3zsAPabWg)
    * ✅ [flutter_gallery_win_desktop__start_up](https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/loicsharma_google.com/a0148122f81f3eee512ba8e59adcfcff86195eac10dc9a95969b36ae63e0d3e0/+/build.proto?server=chromium-swarm.appspot.com&fbclid=IwAR29O3jW-LyaVAwD54jUmnhfZ2mswqtaZascRoGvteT5gaHihxKI4IastgM)
    * ✅ [flutter_view_win_desktop__start_up](https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/loicsharma_google.com/6dac552365a2d5502aeda81563f4e62f7bdb73f383d98ed8d8ae52c62e00edea/+/build.proto?server=chromium-swarm.appspot.com&fbclid=IwAR2_irHDuoZ0V-PSjYDW082yx8ZeDVhOIk0yjQBAZNVa5iKVIGAWZs8v4lo)
    * ✅ [platform_view_win_desktop__start_up](https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/loicsharma_google.com/e6522c77bcbecabdd1f6d38f3b4e1ea41055d8ae7d61f92b741cc953b94d2e15/+/build.proto?server=chromium-swarm.appspot.com&fbclid=IwAR2X7KJDGjQUWJtpq7KY-nUFK-LA6LvmrAinzj0QuF8pEbpwfsAz6Kv3OkM)
    * ✅ [complex_layout_win_desktop__start_up](https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/loicsharma_google.com/a811334185bc077a5cb69e46fc109ee3e679df6a924ee28d3c73f8b18717fa31/+/build.proto?server=chromium-swarm.appspot.com&fbclid=IwAR0gIiXFMnB_MSaqUxVyTpgpJqc37xSKqOzEsf2oD_oU-AhKPqrGQ-ZD7IY)
* `flutter run` console output tests
    * ✅ [run_debug_test_windows](https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/loicsharma_google.com/1b275a8b161c965c44c09565a5a9784e322cded973b52dc24645496f43aead5a/+/build.proto?server=chromium-swarm.appspot.com&fbclid=IwAR1IlBr0824cq9UKi46j_11eto6HTEQ9KVXF5Is1ZxcSIO7G6IlN-slsyI8)
    * ✅ [run_release_test_windows](https://ci.chromium.org/raw/build/logs.chromium.org/flutter/led/loicsharma_google.com/5b259bb5e2c07666fa12f053c3f5bd782bf074563a9afeeea231fa48bd33daa2/+/build.proto?server=chromium-swarm.appspot.com&fbclid=IwAR3DSHzCGL-KN26E-7hQL58qxV2p0Dtb9hE4AZ0HvEY4hp8mCMzX9jznsFQ)

/cc @pbo-linaro

So there appears to be a race situation between the flutter CLI and Xcode. In the CLI, we update the `CONFIGURATION_BUILD_DIR` in the Xcode build settings and then tell Xcode to install, launch, and debug the app. When Xcode installs the app, it should use the `CONFIGURATION_BUILD_DIR` to find the bundle. However, it appears that sometimes Xcode hasn't processed the change to the build settings before the install happens, which causes it to not be able to find the bundle.

Fixes https://github.com/flutter/flutter/issues/135442

--- 

Since it's a timing issue, there's not really a consistent way to test it.

I was able to confirm that it works, though, by using the following steps:
1. Create a flutter project
2. Open the project in Xcode
3. `flutter clean`
4. `flutter run --profile -v`

If I saw a print line `stderr: CONFIGURATION_BUILD_DIR: build/Debug-iphoneos`, that means it first found the old and incorrect `CONFIGURATION_BUILD_DIR` before updating to the the new, so I was able to confirm that it would wait until it updated.

https://github.com/flutter/packages/compare/e548ae1d2045...619af75f7966

2023-09-25 47866232+chunhtai@users.noreply.github.com [go_router] Fixes the Android back button ignores top level route's o… (flutter/packages#4984)
2023-09-25 49699333+dependabot[bot]@users.noreply.github.com Bump actions/checkout from 4.0.0 to 4.1.0 (flutter/packages#4988)
2023-09-25 34871572+gmackall@users.noreply.github.com [camera_android] Set buildconfig to true for compatibility with AGP 8.0+ (flutter/packages#4951)
2023-09-25 stuartmorgan@google.com [various] Remove obsolete symlinks (flutter/packages#4993)

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https://github.com/flutter/engine/compare/230dfeed79ed...7b989a28514e

2023-09-26 skia-flutter-autoroll@skia.org Roll Skia from b961fc353715 to 8264a73430de (1 revision) (flutter/engine#46289)
2023-09-26 49699333+dependabot[bot]@users.noreply.github.com Bump actions/checkout from 4.0.0 to 4.1.0 (flutter/engine#46290)

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https://github.com/flutter/engine/compare/75950dc280d5...230dfeed79ed

2023-09-26 skia-flutter-autoroll@skia.org Roll Dart SDK from 7c749713c688 to 7c3588c05f87 (1 revision) (flutter/engine#46288)
2023-09-26 godofredoc@google.com Prepare fuchsia script to coexist with v1 and v2 of fuchsia builders. (flutter/engine#46126)
2023-09-26 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from uY9WEf2tJxa1Hpp4v... to a56c8yPp4DDlj_Qbl... (flutter/engine#46285)

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https://github.com/flutter/engine/compare/6bf8067392cf...75950dc280d5

2023-09-26 skia-flutter-autoroll@skia.org Roll Dart SDK from 216b25f9ea6f to 7c749713c688 (1 revision) (flutter/engine#46284)
2023-09-25 bdero@google.com [Impeller] Support applying color filters on the CPU for the RRect fast path. (flutter/engine#46281)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from 00e4d00021a7 to b961fc353715 (6 revisions) (flutter/engine#46280)
2023-09-25 jonahwilliams@google.com [Impeller] Dont blow away coverage hint on advanced blends. (flutter/engine#46219)

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This measures the wall clock time between a new frame being scheduled in dart code to the Vsync callback in the engine

It's an important source of lag which isn't shown in the top-level UI / Build time graphs, and can correlate with "invisible" missed/non-scheduled frames

I had to change a few unrelated timings in the test, it was only passing based on luck of sort order, and broke when I added more entries to the timeline.

Part of #129150

https://github.com/flutter/engine/compare/3f606570ac7c...6bf8067392cf

2023-09-25 54558023+keyonghan@users.noreply.github.com Restore goma from rbe before 3.16 branching (flutter/engine#46272)
2023-09-25 bkonyi@google.com Add package:tar to DEPS to fix broken 3H configurations (flutter/engine#46273)
2023-09-25 skia-flutter-autoroll@skia.org Roll Fuchsia Mac SDK from SNqQGAfjWL3PbUABh... to we5owZaebdO_3kyjz... (flutter/engine#46270)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from a19a325cd670 to 00e4d00021a7 (6 revisions) (flutter/engine#46269)
2023-09-25 jonahwilliams@google.com [Impeller] fallback to position data if texture coordinates are undefined. (flutter/engine#46264)
2023-09-25 ian@mckellar.org fuchsia: Update FIDL for unknown interactions (flutter/engine#45773)
2023-09-25 jonahwilliams@google.com [Engine] use QoS classes in iOS engine. (flutter/engine#46265)
2023-09-25 jonahwilliams@google.com Revert "Switch goma to reclient for Linux clang_tidy targets (#45898)" (flutter/engine#46266)

Also rolling transitive DEPS:
  fuchsia/sdk/core/mac-amd64 from SNqQGAfjWL3P to we5owZaebdO_

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https://github.com/flutter/engine/compare/1ae3d20332f0...3f606570ac7c

2023-09-25 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Switch goma to reclient for Linux clang_tidy targets" (flutter/engine#46267)
2023-09-25 43759233+kenzieschmoll@users.noreply.github.com Add description to assert in `history.dart` (flutter/engine#46072)
2023-09-25 54558023+keyonghan@users.noreply.github.com Switch goma to reclient for Linux clang_tidy targets (flutter/engine#45898)
2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from e16a9b5b2c48 to a19a325cd670 (6 revisions) (flutter/engine#46261)
2023-09-25 skia-flutter-autoroll@skia.org Roll Dart SDK from 692273b46610 to 216b25f9ea6f (6 revisions) (flutter/engine#46260)
2023-09-25 54558023+keyonghan@users.noreply.github.com Switch goma to reclient for Linux fuchsia/unopt/android_aot (flutter/engine#45899)

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## Pre-launch Checklist

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In the FormField widget, if a validator is initially set (and validation fails), then subsequently the validator is set to null, the form incorrectly retains its error state. This is not expected behavior as removing the validator should clear any validation errors.

[Velocity Tracker] Fix: Issue 97761: Flutter Scrolling does not match iOS; inadvertent scrolling when user lifts up finger (#132291)

## Issue

**Issue:** https://github.com/flutter/flutter/issues/97761

https://github.com/flutter/flutter/assets/1863934/53c5e0df-b85a-483c-a17d-bddd18db3aa9

## The Cause:

The bug is very simple to understand - `velocity_tracker.dart` **only adds new samples while your finger is moving**.

**Therefore**, if you move your finger quickly & (important) stop suddenly with no extra movement, the last 3 samples will all be > 0 dy. Regardless of how long you wait, you will get movement when you lift up your finger.

**Logs from velocity_tracker.dart:**
Notice: all 3 `_previousVelocityAt` are `dy > 0` despite a 2 second delay since the last scroll
```
// start moving finger
flutter: addPosition dy:-464.0
flutter: addPosition dy:-465.0
flutter: addPosition dy:-466.0
flutter: addPosition dy:-467.0
flutter: addPosition dy:-468.0
flutter: addPosition dy:-469.0
flutter: addPosition dy:-470.0
// stop moving finger here, keep it still for 2 seconds & lift it up
flutter: _previousVelocityAt(-2) samples(-467.0, -468.0)) dy:-176.772140710624
flutter: _previousVelocityAt(-1) samples(-468.0, -469.0)) dy:-375.0937734433609
flutter: _previousVelocityAt(0) samples(-469.0, -470.0)) dy:-175.71604287471447
flutter: primaryVelocity DragEndDetails(Velocity(0.0, -305.5)).primaryVelocity
flutter: createBallisticSimulation pixels 464.16666666666663 velocity 305.4699824197211
```

## The Fix

**There are 3 options to fix it:**
A. sample uniformly *per unit time* (a larger more risky change, hurts battery life)
B. consider elapsed time since the last sample. If greater than X, assume no more velocity. (easy & just as valid)
C. similar to B, but instead add "ghost samples" of velocity zero, and run calculations as normal (a bit tricker, of dubious benefit imo)

**For Option B I considered two approaches:**
1. _get the current timestamp and compare to event timestamp._  This is tricky because events are documented to use an arbitrary timescale & I wasn't able to find the code that generates the timestamps. This approach could be considered more.
2. _get a new timestamp using Stopwatch and compare now vs when the last sample was added._ This is the solution implemented here.  There is a limitation in that we don't know when addSamples is called relative to the event. But, this estimation is already on a very low latency path & still it gives us a *minimum* time bound which is sufficient for comparison. 

**This PR chooses the simplest of the all solutions. Please try it our yourself, it completely solves the problem 😀** Option _B.1_ would be a nice alternative as well, if we can define and access the same timesource as the pointer tracker in a maintainable simple way.

## After Fix

https://github.com/flutter/flutter/assets/1863934/be50d8e7-d5da-495a-a4af-c71bc541cbe3

fixes https://github.com/flutter/flutter/issues/135144

https://github.com/flutter/engine/compare/2c4c1108aa87...1ae3d20332f0

2023-09-25 54558023+keyonghan@users.noreply.github.com Switch goma to reclient for Linux host engine targets (flutter/engine#45884)
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2023-09-25 skia-flutter-autoroll@skia.org Roll Skia from 31ceb1669d1c to 569a30fbdbdf (1 revision) (flutter/engine#46256)

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https://github.com/flutter/packages/compare/98ebcd3d9c05...e548ae1d2045

2023-09-23 49699333+dependabot[bot]@users.noreply.github.com Bump github/codeql-action from 2.21.7 to 2.21.8 (flutter/packages#4952)
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2023-09-22 geral.sbi2@gmail.com [image_picker_android] check if data from result is empty when picking a single img or video (flutter/packages#4836)
2023-09-22 me@nils.re [camera_android] Removes usage of `_ambiguate` method in tests (flutter/packages#4948)
2023-09-22 49699333+dependabot[bot]@users.noreply.github.com [sign_in]: Bump com.google.android.gms:play-services-auth from 20.6.0 to 20.7.0 in /packages/google_sign_in/google_sign_in_android/android (flutter/packages#4841)

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https://github.com/flutter/engine/compare/e6d3bac5c723...2c4c1108aa87

2023-09-25 49699333+dependabot[bot]@users.noreply.github.com Bump archive from 3.3.9 to 3.4.2 in /lib/web_ui (flutter/engine#46253)

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Reverts flutter/flutter#135372

https://github.com/flutter/engine/compare/e1c1022c2d6d...e6d3bac5c723

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https://github.com/flutter/engine/compare/3ea1174ecfaa...e1c1022c2d6d

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https://github.com/flutter/engine/compare/2daf5e7bb249...3ea1174ecfaa

2023-09-25 zanderso@users.noreply.github.com In run_tests.py, separate Dart package unit tests from other tests (flutter/engine#46232)
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Goden tests are easier to understand than `paints..` since the toolbar has a relatively complex path, and this should make PRs that make visual changes easier to review. 

The current goldens don't look correct since I messed up the y offset of the tip of the arrow when the arrow is pointing up. Should be fixed in https://github.com/flutter/flutter/pull/133386

Reverts flutter/flutter#135373

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Linux_samsung_a02 new_gallery__transition_perf"
}
-->
The test has been passing for [50 consecutive runs](https://data.corp.google.com/sites/flutter_infra_metrics_datasite/flutter_check_test_flakiness_status_dashboard/?p=BUILDER_NAME:%22Linux_samsung_a02%20new_gallery__transition_perf%22).
This test can be marked as unflaky.