This reverts commit a44f174e.

Reason: start_up tests become flaky.

See https://github.com/flutter/flutter/issues/28374

TBR: xster

Merge on red to fix the tree

This patch adds a default shader warm up process which moves shader compilation from the animation time to the startup time. This also provides an extension for `runApp` so developers can customize the warm up process.

This should reduce our worst_frame_rasterizer_time_millis from ~100ms to ~20-30ms for both flutter_gallery and complex_layout benchmarks. Besides, this should also have a significant improvement on 90th and 99th percentile time (50%-100% speedup in some cases, but I haven't tested them thoroughly; I'll let our device lab collect the data afterwards).

The tradeoff the is the startup time (time to first frame). Our `flutter run --profile --trace-startup` seems to be a little noisy and I see about 100ms-200ms increase in that measurement for complex_layout and flutter_gallery. Note that this only happens on the first run after install or data wipe. Later the Skia persistent cache will remove the overhead.

This also adds a cubic_bezier benchmark to test the custom shader warm up process.

This should fix https://github.com/flutter/flutter/issues/813 (either by `defaultShaderWarmUp`, or a `customShaderWarmUp`).

https://github.com/flutter/engine/compare/33bb91cc1591...f80928a9e403

git log 33bb91cc15916610261097eb971ec8a11b804d06..f80928a9e403c6b2fc1b8de6a00bf6189b715c40 --no-merges --oneline
f80928a9e Roll src/third_party/skia fdd15284affe..ee1c8a733e5b (15 commits) (flutter/engine#7924)
93f339fb6 fix Memory leak when using PlatformView [IOS] #24714 (flutter/engine#7919)
2d33e775f Roll src/third_party/skia 969659dbb313..fdd15284affe (2 commits) (flutter/engine#7922)
6d4edf235 Roll src/third_party/skia 9431161ca973..969659dbb313 (3 commits) (flutter/engine#7921)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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

If the roll is causing failures, please contact the current sheriff (amirha@google.com), and stop
the roller if necessary.

Needed for Fuchsia roll.

* Minor UI tweaks to Cards demo based on internal feedback

* Analyzer

* Tweak ink ripple opacity

* Address PR feedback

[Material] Add ability to set shadow color and selected shadow color for chips and for chip themes (#28163)

* Add ability to set shadow color for chips and for chip themes

* Add selected shadow color as a property as well

* Update phrasing of documentation

* Address PR feedback

flutter/engine@33bb91c Allow embedders to specify a vsync waiter. (flutter/engine#7914)
flutter/engine@4cb9a14 Allow embedders to add events to the timeline. (flutter/engine#7917)

flutter/engine@cb0f7ece1 Roll src/third_party/skia 63c4d3596915..e9912ca049a0 (8 commits) (flutter/engine#7918)

flutter/engine@043d92c48 Embedder API for setting the persistent cache path (flutter/engine#7915)

* deploy to .dev firebase projects.

* Updated secrets for .dev web sites.

* Fixed missing docs.*.io references.

flutter/engine@f1f19bba8 Revert "Revert "Revert "Reland PerformanceOverlayLayer golden test (flutter/engine#7863)" (flutter/engine#7895)" (flutter/engine#7911)" (flutter/engine#7916)
flutter/engine@5db4b3772 Revert dart rolls (flutter/engine#7913)
flutter/engine@0053c1d50 Roll src/third_party/dart 75ee523f91..4cff5a4fd6 (6 commits)
flutter/engine@8620579cf Roll src/third_party/skia 9a049e6ce39d..63c4d3596915 (8 commits) (flutter/engine#7909)
flutter/engine@aa2b287cb Reland flutter/engine#7777 with proper LICENSE (flutter/engine#7888)
flutter/engine@a5773d121 Do not add ghost runs for trailing whitespace if the text is ellipsized (flutter/engine#7906)
flutter/engine@93eeb48ba Revert "Revert "Remove unnecessary entry-point closurization. (flutter/engine#7827)" (flutter/engine#7876)" (flutter/engine#7904)
flutter/engine@bbaeba3f3 Roll src/third_party/skia 05ff93c43ea5..9a049e6ce39d (11 commits) (flutter/engine#7903)
flutter/engine@1cf6b8b64 Roll src/third_party/dart 5ddd157809..75ee523f91 (19 commits)
flutter/engine@be32040ef Roll src/third_party/skia 348227b89430..05ff93c43ea5 (2 commits) (flutter/engine#7901)
flutter/engine@293b3de98 Roll src/third_party/skia 20ebd0cb3882..348227b89430 (4 commits) (flutter/engine#7900)
flutter/engine@6e6020d29 Eliminate .member = foo struct initialization (flutter/engine#7899)
flutter/engine@6d8bd99af Revert "Reland PerformanceOverlayLayer golden test (flutter/engine#7863)" (flutter/engine#7895)
flutter/engine@39f7066b6 Test profile and release build and unit tests (flutter/engine#7880)
flutter/engine@abe9826a9 Add accessibility semantics support to embedder (flutter/engine#7891)
flutter/engine@ce7016e1f Roll src/third_party/skia e471c05f92e8..20ebd0cb3882 (4 commits) (flutter/engine#7894)
flutter/engine@684c9394c Respect the custom GL proc table when creating the resource context on the IO thread. (flutter/engine#7893)
flutter/engine@e11d0e96f Android embedding refactor pr5 add flutterengine impl (flutter/engine#7878)
flutter/engine@2f4a38dbd Android embedding refactor pr3 add remaining systemchannels (flutter/engine#7892)
flutter/engine@8427d73c8 Reland PerformanceOverlayLayer golden test (flutter/engine#7863)
flutter/engine@61fc1786f Roll src/third_party/dart c92d5ca288..5ddd157809 (153 commits)
flutter/engine@b0671145a Roll src/third_party/skia 7738736f9622..e471c05f92e8 (23 commits) (flutter/engine#7889)
flutter/engine@6d7eb5218 Revert "Android embedding refactor pr3 add remaining systemchannels (flutter/engine#7874)" (flutter/engine#7886)
flutter/engine@dad6ec01c Correct onAccessibilityFeaturesChanged docs (flutter/engine#7883)

This reverts commit 6f5e88a5.

* Allow for gradle downloading missing SDK assets if SDK licenses are present.

* Fix license path for missing sdkmanager

* Cirrus re-run...

* Fix condition check

* rename props, add docs, rename method

* fix tests after param changes

* Fix weird path for flutter run and add tests

* remove print, fix tests

Fix the length of the valueHelp on the --sample option for the create command, and turn on wrapping. (#28264)

The wrapping for some commands was never actually turned on, so this turns it on.

Also, it shortens the `valueHelp` for the `--sample` option to be just "id" instead of "the sample ID of the desired sample from the API documentation website (http://docs.flutter.io)", which was causing the line to get far too long.

Fixes #23074

* reduce iterations to avoid test timing out

This reverts commit 1c021506.

The pre-commit tests never actually ran, so it looked green when it wasn't. This breaks 16 tests that depend on the argument existing, even though it isn't actually used.

This command line argument has already been removed in the main
Dart repository, so building flutter with the latest dart fails.

* Fix for nan pressure values and values outside min and max pressure ranges

* media query check

Update README.md to remove 404 link on Posse image

* Added sample to AnimatedWidget

* Updated AnimatedWidget example to use listenable from parent

* Made progress private and changed widget name

Fix issue where SliverPersistentHeader that is both floating and pinned would scroll down when scrolling past the beginning of the ScrollView (#27433)