* Makes FlexibleSpaceSettingsPublic and adds a test

This reverts commit 76a1abd4.

* Adds functionality for progress indicator height to be controlled by the parent.

See https://github.com/flutter/flutter/issues/17910

https://github.com/flutter/engine/compare/e91e4db7e03d...88cb78cdf62c

git log e91e4db7e03d..88cb78cdf62c --no-merges --oneline
88cb78cdf Roll src/third_party/skia 13853a120d5a..30edaaac1da4 (1 commits) (flutter/engine#6732)
eacf61efd Roll src/third_party/skia 2dc1e34f9029..13853a120d5a (1 commits) (flutter/engine#6731)
7618e5447 Roll src/third_party/skia 26fcd7166c74..2dc1e34f9029 (2 commits) (flutter/engine#6730)
10ec1fd6b Roll src/third_party/skia 94d7af7bcc96..26fcd7166c74 (5 commits) (flutter/engine#6729)
9e1f546a8 Add an overlay surface on top of embedded UIViews. (flutter/engine#6726)
136055669 Roll src/third_party/skia e978ca297965..94d7af7bcc96 (5 commits) (flutter/engine#6727)
c57d29ab6 Fixed typo (flutter/engine#6717)
f3fcb8f01 Roll src/third_party/skia f1eda00bf6b0..e978ca297965 (10 commits) (flutter/engine#6725)
fbb7893a0 Report asset names in loading trace events. (flutter/engine#6713)
d06ace699 Roll src/third_party/skia 3bdaa46bff71..f1eda00bf6b0 (11 commits) (flutter/engine#6724)
60d4d582f Roll src/third_party/skia 763fc966993d..3bdaa46bff71 (2 commits) (flutter/engine#6723)


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So we're sure that:
1. We won't break the API by not allowing to mutate fields
2. We won't forget to markNeedsAddToScene after mutation

These tests have been run for a few days now with no flakiness.

This is needed to run flutter app on multiple iOS devices at a time.

This reverts commit 949cfcf1.

beautified Readme , removed bullet

* Use maybePop in place of pop in ModalBarrier

https://github.com/flutter/engine/compare/c79faed71c66...e91e4db7e03d

git log c79faed71c66..e91e4db7e03d --no-merges --oneline
e91e4db7e Roll src/third_party/skia e008d6feb2d0..763fc966993d (1 commits) (flutter/engine#6722)
28514b524 Roll src/third_party/skia 1ae419b62b2b..e008d6feb2d0 (1 commits) (flutter/engine#6721)
b9726c240 Roll src/third_party/skia 628f0a57d102..1ae419b62b2b (2 commits) (flutter/engine#6720)
1b0d26a92 Roll src/third_party/skia d7a7586b0d2f..628f0a57d102 (1 commits) (flutter/engine#6718)


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https://github.com/flutter/engine/compare/0ec3b7d437d4...c79faed71c66

git log 0ec3b7d437d4..c79faed71c66 --no-merges --oneline
c79faed71 Decode UIView's creation parameters and pass them to the view factory. (flutter/engine#6715)
467ff33aa Roll src/third_party/skia 348a03729796..d7a7586b0d2f (12 commits) (flutter/engine#6714)


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https://github.com/flutter/engine/compare/d9c2b215abda...0ec3b7d437d4

git log d9c2b215abda..0ec3b7d437d4 --no-merges --oneline
0ec3b7d43 Apply changes to the embedded UIView tree when presenting a frame (flutter/engine#6712)
92944f72f Move FlutterPlatformViewsController into FlutterEngine. (flutter/engine#6709)
d34cb1757 Roll src/third_party/skia 9985a27c06ad..348a03729796 (15 commits) (flutter/engine#6710)
a27d2f2bc Check needs_painting in RasterCache::Prepare (flutter/engine#6708)
552fae60c Roll src/third_party/skia 83d923f38664..9985a27c06ad (2 commits) (flutter/engine#6707)
67ba69717 Roll src/third_party/skia 4d8f48db9ef5..83d923f38664 (2 commits) (flutter/engine#6706)
54882ef86 Roll src/third_party/skia 69a72945dcdd..4d8f48db9ef5 (1 commits) (flutter/engine#6705)
635e20498 Roll src/third_party/skia 1801b94e85b4..69a72945dcdd (1 commits) (flutter/engine#6704)
059876ea9  Delay embedded UIViews touch events until the framework says so. (flutter/engine#6665)
605ae5d88 Roll src/third_party/skia 4c169456061d..1801b94e85b4 (2 commits) (flutter/engine#6703)
d8672baaa Ensure Simulator publishes mDNS records (flutter/engine#6696)


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* Adds DropDownFormField Convenience Class

* Use Xcode build configurations to drive Flutter build mode

* Proper check wrt local_engine, print error if profile mode misisng

* Remove unused code, update tests, fix template problem, update warning

* fix up warning

* add explanatory dev comment

* fix whitespace

* missing words, change lambda arrow to function body

* error indentation

* Test early exits for xcode_backend.sh

* only on macOS, use right test

* Update error messages

* case insensitive compare for build config

* Update gallery podfile

* update projects to add profile configuration

* make compatible with flavors

* add missing plist files

* add FLUTTER_FRAMEWORK_DIR back, set swift version for profile, tell Podfile about profile

* Adds drawer state query functions

Re-landing #23412 with a fix to the PlatformLayer's addToScene signature.

#23412 was broken by the change to Layer done in #23434.

It seemed green as the presubmits were done before #23434 was landed, and when #23412 landed it broke the build.

Reverts #23779

https://github.com/flutter/engine/compare/3a6775730028...d9c2b215abda

git log 3a6775730028..d9c2b215abda --no-merges --oneline
d9c2b215a Roll src/third_party/skia 78252fedaab9..4c169456061d (12 commits) (flutter/engine#6701)
e56c3b700 Roll src/third_party/skia 52a715455181..78252fedaab9 (6 commits) (flutter/engine#6700)
f5d571a06 Roll src/third_party/skia 5785405afa1b..52a715455181 (5 commits) (flutter/engine#6699)
48f26625d Roll src/third_party/skia dde307f14273..5785405afa1b (1 commits) (flutter/engine#6698)


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This reverts commit 67ffe1c2.

This PR adds the full framework stack (layer->render object->widget, and
service) for embedding iOS views with minimal functionality.

I allowed myself to throw the entire framework stack in one PR since we're mostly
mirroring the structure we already established for embedded Android views, so this PR
is a little bigger than usual. I'm happy to break it down to the
different pieces of the stack if reviewers prefer.

Specifically this PR adds:
* A UiKitView widget for embedding a UIView in the widget tree.
* A RenderUiKitView which is the render object for showing a
  UIView.
* A PlatformViewLayer which denotes the position of a UIView in the
  layer tree.
* The iOS platform_views system channel client code in services/platform_views.dart
* Splits the fake platform views controller to an Android and iOS
  controllers.

TBD in following PRs:
* Plumb the layout direction all the way to the platform view (currently
  there is still no engine support for it).
* Integrate with gesture arenas (engine support is still missing as
  well).

* [Material] Add dialog theme.

* Address Hans' first round comments.

* Address Hans' Second round comments.

* Fix theme tests

* Address Will's comments, add golden test

* Update goldens

* Custom Border radius 16.0

* Address Hans' Comments

* Second round comments

* fix imports

* Create TabBarTheme of(...) constructor

* First round comments

* fix imports

This adds flutter create --sample which allows users to execute a command which will create a working sample app from samples embedded in the API docs.

The command looks something like this:

flutter create --sample=chip.DeletableChipAttributes.onDeleted mysample

Stop wrapping adb, gradle and ios logger output, and update terminal wrapping column dynamically. (#23592)

Subcommand output (gradle, adb, etc) is no longer wrapped, and wrapping notices when the terminal column width changes dynamically now.

Fixes #23267.
Fixes #23266.