Fixes "differenet" => "different" and reflows the doc to 80 char line length.

Reverts flutter/flutter#140521
Initiated by: zanderso
This change reverts the following previous change:
Original Description:
Original PR: https://github.com/flutter/flutter/pull/138057
Revert: https://github.com/flutter/flutter/pull/140502
Issue: https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_android%20flutter_test_performance/12787/overview
Exception: flutter test rendered unexpected output (1 bad lines)
Explanation: leak tracker adds tear down even when there is no leak tracking, because at the moment of adding tear down it is unclear if leak tracking will be used for some tests.
Fix: add enabling flag for leak tracker and make creation of tear down conditional.
Prerequisites:

https://github.com/flutter/engine/compare/bf979d220283...bf232c4da241

2024-01-03 30870216+gaaclarke@users.noreply.github.com [Impeller] pulled out the path unit tests to their own file (flutter/engine#49499)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

This PR changes the regular cursor to a floating cursor when a long press occurs.

This is a new feature. Fixes  #89228

fixes https://github.com/flutter/flutter/issues/138289

---

SegmentedButtom.styleFrom has been added to the segment button, so there is no longer any need to the button style from the beginning. It works like ElevatedButton.styleFrom only I added selectedForegroundColor, selectedBackgroundColor. In this way, the user will be able to change the color first without checking the MaterialState states. I added tests of the same controls.

#129215 I opened this problem myself, but I was rejected because I handled too many items in a PR. For now, I wrote a structure that only handles MaterialStates instead of users.

old (still avaliable)
<img width="626" alt="image" src="https://github.com/flutter/flutter/assets/65075121/9446b13b-c355-4d20-bda2-c47a23d42d4f">

new (just an option for developer)
<img width="483" alt="image" src="https://github.com/flutter/flutter/assets/65075121/0a645257-4c83-4029-9484-bd746c02265f">

### Code sample

<details>
<summary>expand to view the code sample</summary> 

```dart
import 'package:flutter/material.dart';

/// Flutter code sample for [SegmentedButton].

void main() {
  runApp(const SegmentedButtonApp());
}

enum Calendar { day, week, month, year }

class SegmentedButtonApp extends StatefulWidget {
  const SegmentedButtonApp({super.key});

  @override
  State<SegmentedButtonApp> createState() => _SegmentedButtonAppState();
}

class _SegmentedButtonAppState extends State<SegmentedButtonApp> {
  Calendar calendarView = Calendar.day;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(useMaterial3: true),
      home: Scaffold(
        body: Center(
          child: SegmentedButton<Calendar>(
            style: SegmentedButton.styleFrom(
              foregroundColor: Colors.amber,
              visualDensity: VisualDensity.comfortable,
            ),
            // style: const ButtonStyle(
            //   foregroundColor: MaterialStatePropertyAll<Color>(Colors.deepPurple),
            //   visualDensity: VisualDensity.comfortable,
            // ),
            segments: const <ButtonSegment<Calendar>>[
              ButtonSegment<Calendar>(
                  value: Calendar.day,
                  label: Text('Day'),
                  icon: Icon(Icons.calendar_view_day)),
              ButtonSegment<Calendar>(
                  value: Calendar.week,
                  label: Text('Week'),
                  icon: Icon(Icons.calendar_view_week)),
              ButtonSegment<Calendar>(
                  value: Calendar.month,
                  label: Text('Month'),
                  icon: Icon(Icons.calendar_view_month)),
              ButtonSegment<Calendar>(
                  value: Calendar.year,
                  label: Text('Year'),
                  icon: Icon(Icons.calendar_today)),
            ],
            selected: <Calendar>{calendarView},
            onSelectionChanged: (Set<Calendar> newSelection) {
              setState(() {
                calendarView = newSelection.first;
              });
            },
          ),
        ),
      ),
    );
  }
}

```

</details>

https://github.com/flutter/engine/compare/c62bcff5b809...bf979d220283

2024-01-03 john@johnmccutchan.com Fix a crash in the new SurfaceProducer external texture (flutter/engine#49496)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

https://github.com/flutter/engine/compare/98b72c7ffe71...c62bcff5b809

2024-01-03 jonahwilliams@google.com [Impeller] Disable compute for Vulkan. (flutter/engine#49463)
2024-01-03 dkwingsmt@users.noreply.github.com Revert skiping illegal render in Dart (flutter/engine#49473)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

This allows unit tests to use the impeller backend, which can be useful for Scubas/golden tests.

https://github.com/flutter/engine/compare/cf7536964a2f...98b72c7ffe71

2024-01-03 skia-flutter-autoroll@skia.org Roll Skia from 9e8069bba51d to 1144b7950404 (1 revision) (flutter/engine#49494)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

https://github.com/flutter/flutter/issues/1670

Note: This PR replaces the the original PR (https://github.com/flutter/flutter/pull/138240) that got into a state where a rebase was not possible and made it difficult to determine what was causing unrelated test failures.

Reference: [author:lsaudon](https://github.com/flutter/flutter/issues?q=author%3Alsaudon)

Added a minimal wiki page about how to use the `update-packages` tool: https://github.com/flutter/flutter/wiki/Updating-dependencies-in-Flutter

This PR adds a link to that wiki page at the top of each pubspec.yaml file

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Linux_pixel_7pro native_assets_android"
}
-->
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%20native_assets_android%22).
This test can be marked as unflaky.

https://github.com/flutter/engine/compare/3b6edee0f8f7...cf7536964a2f

2024-01-03 skia-flutter-autoroll@skia.org Roll Skia from a9db1213b179 to 9e8069bba51d (18 revisions) (flutter/engine#49490)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

https://github.com/flutter/packages/compare/fa74d3e1e71a...bbb41347518e

2024-01-02 43054281+camsim99@users.noreply.github.com [camerax] Implement `lockCaptureOrientation` & `unlockCaptureOrientation` (flutter/packages#5285)
2024-01-02 49699333+dependabot[bot]@users.noreply.github.com Bump github/codeql-action from 3.22.11 to 3.22.12 (flutter/packages#5738)
2024-01-02 chillers@google.com Add Flutter CI Status badge to README (flutter/packages#5733)
2023-12-26 49699333+dependabot[bot]@users.noreply.github.com [path_provider]: Bump androidx.annotation:annotation from 1.7.0 to 1.7.1 in /packages/path_provider/path_provider_android/android (flutter/packages#5709)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-packages-flutter-autoroll
Please CC flutter-ecosystem@google.com,rmistry@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

https://github.com/flutter/engine/compare/3a7aa01b0a7d...3b6edee0f8f7

2024-01-03 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Roll Dart SDK from 7e9f7eab80d3 to c5a75ac9057c (1 revision)" (flutter/engine#49491)
2024-01-03 skia-flutter-autoroll@skia.org Roll Skia from 4b16117e94b2 to a9db1213b179 (1 revision) (flutter/engine#49487)
2024-01-03 dnfield@google.com [Impeller] Allow multiple --runtime-stage-* parameters to impellerc (flutter/engine#49475)
2024-01-03 skia-flutter-autoroll@skia.org Roll Dart SDK from 7e9f7eab80d3 to c5a75ac9057c (1 revision) (flutter/engine#49478)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Pass key into _BottomNavigationTile

Adding a optional key parameter to BottomNavigationBarItem to be passed through to _BottomNavigationTile.
This will allow easier testing in some scenarios, and fix the splash appearing on the wrong tile.

https://github.com/flutter/flutter/issues/139615
https://github.com/flutter/flutter/issues/34833

<!-- meta-tags: To be used by the automation script only, DO NOT MODIFY.
{
  "name": "Linux_android hybrid_android_views_integration_test"
}
-->
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_android%20hybrid_android_views_integration_test%22).
This test can be marked as unflaky.

https://github.com/flutter/engine/compare/e95e12368a42...3a7aa01b0a7d

2024-01-02 jonahwilliams@google.com [Impeller] add doc on iOS flamegraph capture. (flutter/engine#49469)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

For https://github.com/flutter/flutter/issues/125875 and https://github.com/flutter/engine/pull/45522

According to [this discussion](https://github.com/flutter/flutter/pull/139446#discussion_r1424776370), Just added `forceMultiline` to JSON on `_configurationToJson`. @LongCatIsLooong @Renzo-Olivares

https://github.com/flutter/engine/compare/b5e79bd249b8...e95e12368a42

2024-01-02 737941+loic-sharma@users.noreply.github.com Revert "Reland "[Windows] Move to FlutterCompositor for rendering" (flutter/engine#49461)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

This is a reland of https://github.com/flutter/flutter/pull/140806 which had an issue with package versions.

Reland https://github.com/flutter/flutter/pull/140478 with `ios_content_validation_test` test fix.
```
[ios_content_validation_test] Process terminated with exit code 0.
Task result:
{
  "success": true,
  "data": null,
  "detailFiles": [],
  "benchmarkScoreKeys": [],
  "reason": "success"
}

```

__________

1. Change templates to `IPHONEOS_DEPLOYMENT_TARGET`, `MinimumOSVersion`, and Podfile `platform :ios` to 12.0.
2. Add migrator for Podfile part to migrate `platform :ios, '11.0'` -> `platform :ios, '12.0'`
3. Compile with `-miphoneos-version-min=12.0`
4. Run the migrator on all example apps and integration tests.

See also https://github.com/flutter/flutter/pull/62902 and https://github.com/flutter/flutter/pull/85174 and https://github.com/flutter/flutter/pull/101963

Fixes https://github.com/flutter/flutter/issues/136060

This enables multi-view apps to start with zero views.

Fixes https://github.com/flutter/flutter/issues/140665 by replacing use of `setUpAll` and `teardownAll` with `setUp` and `teardown` respectively.

My theory has to how this issue happened (and how this PR fixes it) is that `setUpAll` is not guaranteed to run after any `setUp` in any parent test groups. However, `setUp` is guaranteed to run after any set-up callbacks in parent groups. From the [documentation](https://api.flutter.dev/flutter/flutter_test/setUp.html): 

> If this is called within a test group, it applies only to tests in that group. The body will be run after any set-up callbacks in parent groups or at the top level.

Meanwhile, [`setUpAll`](https://api.flutter.dev/flutter/flutter_test/setUpAll.html) has a weaker documented guarantee that applies only to other `setUpAll` calls:

> If this is called within a test group, The body will run before all tests in that group. It will be run after any [setUpAll](https://api.flutter.dev/flutter/flutter_test/setUpAll.html) callbacks in parent groups or at the top level. It won't be run if none of the tests in the group are run.

Fixes #139196

https://github.com/flutter/engine/compare/b02d59a2a607...b5e79bd249b8

2024-01-02 dnfield@google.com Start wiring up fragment program for OpenGLES (flutter/engine#49347)
2024-01-02 skia-flutter-autoroll@skia.org Roll Dart SDK from 014514e3e5b9 to 7e9f7eab80d3 (2 revisions) (flutter/engine#49471)
2024-01-02 yjbanov@google.com [web] make TextStyle implementations consistent (flutter/engine#49465)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Reverts flutter/flutter#140806
Initiated by: zanderso
This change reverts the following previous change:
Original Description:
This is an integration test associated with https://github.com/flutter/engine/pull/49268

This is an integration test associated with
https://github.com/flutter/engine/pull/49268

https://github.com/flutter/engine/compare/9d89f8727976...b02d59a2a607

2024-01-02 john@johnmccutchan.com Android Platform Views support Verified Input Events (flutter/engine#49268)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

https://github.com/flutter/engine/compare/a06926d05d2b...9d89f8727976

2024-01-02 30870216+gaaclarke@users.noreply.github.com [Impeller] new blur: implemented ping ponging (flutter/engine#49252)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Reverts flutter/flutter#140478
Initiated by: loic-sharma
This change reverts the following previous change:
Original Description:
1. Change templates to `IPHONEOS_DEPLOYMENT_TARGET`, `MinimumOSVersion`, and Podfile `platform :ios` to 12.0.
2. Add migrator for Podfile part to migrate `platform :ios, '11.0'` -> `platform :ios, '12.0'`
3. Compile with `-miphoneos-version-min=12.0`
4. Run the migrator on all example apps and integration tests.

See also https://github.com/flutter/flutter/pull/62902 and https://github.com/flutter/flutter/pull/85174 and https://github.com/flutter/flutter/pull/101963

Fixes https://github.com/flutter/flutter/issues/136060

Fixes https://github.com/flutter/flutter/issues/131435, https://github.com/flutter/flutter/issues/104594, https://github.com/flutter/flutter/issues/43400

Currently the method we use for text span hit testing `TextPainter.getPositionForOffset` always returns the closest `TextPosition`, even when the given offset is far away from the text.

The new TextPaintes method tells you the layout bounds `(width =  letterspacing / 2 + x_advance + letterspacing / 2, height = font ascent + font descent)` of a character, the PR changes the hit testing implementation such that a TextSpan is only considered hit if the point-down event landed in one of its character's layout bounds.

Potential issues:

In theory since the text is baseline aligned, we should use the max ascent and max descent of each character to calculate the height of the text span's hit-test region, in case some characters in the span have to fall back to a different font, but that will be slower and it typically doesn't make a huge difference.
This is a breaking change.

https://github.com/flutter/engine/compare/194d90de78cc...a06926d05d2b

2024-01-02 dnfield@google.com Make sure to finish the suite if all tests are skipped (flutter/engine#49339)
2024-01-02 26625149+0xZOne@users.noreply.github.com Fix NPE when platform plugin delegate is null (flutter/engine#49391)
2024-01-02 26625149+0xZOne@users.noreply.github.com Add try-with-resource support to TraceSection (flutter/engine#49445)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

1. Change templates to `IPHONEOS_DEPLOYMENT_TARGET`, `MinimumOSVersion`, and Podfile `platform :ios` to 12.0.
2. Add migrator for Podfile part to migrate `platform :ios, '11.0'` -> `platform :ios, '12.0'`
3. Compile with `-miphoneos-version-min=12.0`
4. Run the migrator on all example apps and integration tests.

See also https://github.com/flutter/flutter/pull/62902 and https://github.com/flutter/flutter/pull/85174 and https://github.com/flutter/flutter/pull/101963

Fixes https://github.com/flutter/flutter/issues/136060

*Replace this paragraph with a description of what this PR is changing or adding, and why. Consider including before/after screenshots.*

*List which issues are fixed by this PR. You must list at least one issue. An issue is not required if the PR fixes something trivial like a typo.*

*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*

Reverts flutter/flutter#123828

Fixes https://github.com/flutter/flutter/issues/140523