This appears to trigger an error during AOT snapshot of the gallery as
follows:

```
stdout: [   +6 ms] Building AOT snapshot in release mode (ios-release)...
stdout: [  +15 ms] Extra gen_snapshot options: [--print_snapshot_sizes]
stdout: [   +7 ms] /usr/bin/arch -x86_64 /Users/flutter/.cocoon/flutter/bin/cache/artifacts/engine/ios-release/gen_snapshot --await_is_keyword --causal_async_stacks --packages=.packages --url_mapping=dart:ui,/Users/flutter/.cocoon/flutter/bin/cache/pkg/sky_engine/lib/ui/ui.dart --url_mapping=dart:vmservice_io,/Users/flutter/.cocoon/flutter/bin/cache/pkg/sky_engine/sdk_ext/vmservice_io.dart --embedder_entry_points_manifest=/Users/flutter/.cocoon/flutter/bin/cache/artifacts/engine/ios-release/dart_vm_entry_points.txt --embedder_entry_points_manifest=/Users/flutter/.cocoon/flutter/bin/cache/artifacts/engine/ios-release/dart_io_entries.txt --print_snapshot_sizes --snapshot_kind=app-aot-assembly --assembly=build/aot/arm64/snapshot_assembly.S /Users/flutter/.cocoon/flutter/examples/flutter_gallery/lib/main.dart
stderr: [+9324 ms] Error: 'file:///Users/flutter/.cocoon/flutter/examples/flutter_gallery/lib/demo/cupertino/cupertino_segmented_control_demo.dart': error: line 19 pos 1: circular dependency for function _CupertinoSegmentedControlDemoState
stderr: [        ] class _CupertinoSegmentedControlDemoState extends State {
stderr: [        ] ^
stderr: [  +33 ms] Dart snapshot generator failed with exit code 254
stderr: [        ] Snapshotting (IOSArch.arm64) exited with non-zero exit code: 254
stdout: [        ] Built to build/aot/.
stdout: [  +10 ms] "flutter aot" took 9,485ms.
```

This reverts commit 9d49ee3b.

* Adding segmented control to gallery

* Fix use of Future<void> as a Future<bool>

This should make it more obvious from the error what's gone wrong if we see a repeat of #19096 (previously the error was something like "Bad state: future already completed").

* Rename util -> test_utils

* Rename flutter_test_driver -> test_driver

* Switch testWithContext -> test

* Remove unused import

* Move test project into a class to make it easier to have multiple of these

Each "TestProject" class can contain its files and things like named breakpoint locations.

* Split expression evaluation tests into own file

* Include last response in error messages

* Update expectations based on current bugs

* Fix async-ness in tests

* Fix incorrect expectation in test

* Fix incorrect evaluations

* Remove skips for tests that are now passing on master

* Expect pass on Linux

🤷‍♂️

* Call the code

* Skip expression evaluation tests on Windows

* Skip whole group, not just one test

* Remove duplicated method from merge

* Fix misplaced close of group

* Remove code that was duplicated from test we copied

Not sure how this ended up in here?

* Re-fix typo

Added animation to segmented control widget.

This allows us to collect code coverage for Fuchsia tests.

A significant amonut of code uses defaultTargetPlatform, so it's
currently impossible to run most apps on Windows. This adds a mapping
from Windows as a host to Android as a target, paralleling the
macOS->iOS and Linux->Android mappings.

This allows more use of Windows as a host platform (e.g., for testing,
as in issue #17768).

This will let us re-use that code from fuchsia_tester.dart.
Tested by running the stocks example tests with coverage collection before and after.
.lcov files are identical.

Put the nav bar padding inside the CustomMultiChildLayout for correct centering and allow custom padding (#19129)

* adjust declared types to work with dart 2 typing at runtime

* review comments

* update packages/flutter_tools/lib/src/ios/simulators.dart

* Fix path of ios module template files

* Fix more paths

* Add additional functionality to integration test driver

* Typo

* Remove delays we shouldn't need + comments

* Fix typos

* Adding a setup function for hot restart that can be overwritten to perform any necessary initialization before a restart is started.

* Adding a test for setupHotRestart

* Removing local pubspec change

* Fixing some type annotation errors

* Responding to comments

* Merge

* Update goldens

This reverts commit edc16473.

Await stream cancellations before trying to complete

* Roll engine to 21c7d6a5da47165d076928fbe460badbbead24cd

flutter/engine@21c7d6a Revert "Add antiAlias and saveCount to clipPath and restore (#5638)"
flutter/engine@70dcbb5 Roll src/third_party/skia d818ebf4a317..9aa30c6ee0e5 (11 commits)
flutter/engine@ad42324 Roll src/third_party/skia a219419c9d76..d818ebf4a317 (2 commits)
flutter/engine@f2eb83a Roll src/third_party/skia 00d2e8ebcb13..a219419c9d76 (1 commits)
flutter/engine@0ec7669 Roll src/third_party/skia 8451daabb23d..00d2e8ebcb13 (1 commits)
flutter/engine@061e899 Support all keyboard actions. (#11344)
flutter/engine@bc6b250 Roll src/third_party/skia 34024a7c478c..8451daabb23d (1 commits)
flutter/engine@df4dffb Roll src/third_party/skia 75e69028956d..34024a7c478c (1 commits)
flutter/engine@d8770d4 Roll src/third_party/skia cf863fb9b446..75e69028956d (1 commits)
flutter/engine@b88a8b3 Roll src/third_party/skia b7b9d02ac020..cf863fb9b446 (1 commits)
flutter/engine@2261ccf [fuchsia] Update scenic lib path.
flutter/engine@4c4ef98 [fuchsia] Rename scenic_lib => scenic
flutter/engine@f0c21f3 Roll src/third_party/skia 184d408b646b..b7b9d02ac020 (7 commits)
flutter/engine@a2bf805 Add antiAlias and saveCount to clipPath and restore
flutter/engine@9e450d1 Roll src/third_party/skia c91fe3ab1c5d..184d408b646b (10 commits)
flutter/engine@e663996 Roll src/third_party/skia eb8f8106f38c..c91fe3ab1c5d (5 commits)
flutter/engine@fecd66f Roll src/third_party/skia 723b1f6ef941..eb8f8106f38c (1 commits)
flutter/engine@4466d61 Remove vmservice_io.main from entry points.
flutter/engine@f279dfe Roll src/third_party/skia 7e2327b133db..723b1f6ef941 (1 commits)
flutter/engine@a885bd4 Roll src/third_party/skia 24d18ced1ad7..7e2327b133db (6 commits)
flutter/engine@ad1bd47 Roll src/third_party/skia a1e5630183c1..24d18ced1ad7 (7 commits)
flutter/engine@ce06bba ensure a11y state is communicated back to flutter
flutter/engine@c54a57e Roll src/third_party/skia b1b87d9df81e..a1e5630183c1 (10 commits)
flutter/engine@a9e5354 Roll src/third_party/skia 385804514edf..b1b87d9df81e (6 commits)
flutter/engine@2006e7d Roll src/third_party/skia e97bb26893a1..385804514edf (1 commits)
flutter/engine@2942061 Roll src/third_party/skia e2e52e46ca63..e97bb26893a1 (1 commits)
flutter/engine@e378811 Roll src/third_party/skia 14de25dfc7c4..e2e52e46ca63 (2 commits)
flutter/engine@48cc8f2 Roll src/third_party/skia 551dc3e91143..14de25dfc7c4 (2 commits)
flutter/engine@00ddf13 libtxt: apply an offset to drawing operations instead of translating the canvas
flutter/engine@2c5647c Roll src/third_party/skia 059a9ab4bcd0..551dc3e91143 (5 commits)
flutter/engine@9e44004 Roll src/third_party/skia 45c9dab4c3ec..059a9ab4bcd0 (8 commits)
flutter/engine@fbb3436 Remove some unused code from the Android host
flutter/engine@36f3f95 Roll src/third_party/skia 37b7e4714558..45c9dab4c3ec (1 commits)
flutter/engine@57e2e0c Roll src/third_party/skia c421ca1d6e41..37b7e4714558 (2 commits)
flutter/engine@ce417e2 Roll src/third_party/skia 5b201e3b0ba8..c421ca1d6e41 (3 commits)
flutter/engine@05f5a18 Roll src/third_party/skia d47fe095cf88..5b201e3b0ba8 (6 commits)
flutter/engine@33b70e0 Roll src/third_party/skia 9c0ce41cf711..d47fe095cf88 (12 commits)
flutter/engine@7dab419 Roll src/third_party/skia d4b2adeaa929..9c0ce41cf711 (7 commits)
flutter/engine@d3fa01a Roll src/third_party/skia f46710802ad5..d4b2adeaa929 (1 commits)

This reverts commit 989f5741.

* fixed segmented control golden test

* fixed segmented control golden test

* added cursorWidth, cursorRadius

* added default value for cursorWidth based on Apple specs

* test default cursorWidth

* removed cursorHeight stuff

* added functionality to keep cursor from blinking

* cursor width and radius is configurable + tests

* changed goldens repo version in goldens.version

* working version of configurable cursor (erased debugKeepCursorOn)

* minor changes

* docs

* changed textfield test that was failing due to new default cursorwidth

* added default value of cursorwidth in RenderEditable

* only run golden file tests on Mac

* cursor tests

* the tests are actually there now

* weak warning fixed

* switching to Linux

* changed default cursorWidth: 2.0 -> 1.0

* assorted changes, including changing text field test

* re-paint -> re-layout when changing cursorWidth