This API requires the UPDATE_DEVICE_STATS permission on KitKat

* Allow app bar actions to be themed independently if needed

* Update SliverAppBar docs that were out of date

* Clarify fallback behavior in a comment

* Analyzer

* Address PR feedback

* Address PR feedback

* Put back checks on actions icon theme

* Address PR feedback

* Retrigger CI

https://github.com/flutter/engine/compare/502c9c4002a6...f7306394e303

git log 502c9c4002a6b456f829f79bfbd2ff61d075d1d7..f7306394e303a210a9971acb60f9ba11d7c64ec8 --no-merges --oneline
f7306394e fix sendLocales on old android versions (flutter/engine#7937)

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https://github.com/flutter/engine/compare/0546e1e5e901...502c9c4002a6

git log 0546e1e5e9015e7a597c9e59cf89ee614a260251..502c9c4002a6b456f829f79bfbd2ff61d075d1d7 --no-merges --oneline
502c9c400 Android Embedding PR 6: Introduce FlutterView structure with FlutterSurfaceView and FlutterTextureView. (flutter/engine#7896)
687229e70 Roll src/third_party/skia 52d8a5976a23..e1636a4b56aa (1 commits) (flutter/engine#7943)

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0546e1e5e Roll src/third_party/skia 33c1b315265c..52d8a5976a23 (1 commits) (flutter/engine#7941) (#28422)


https://github.com/flutter/engine/compare/90fcaff9008e...0546e1e5e901

git log 90fcaff9008e04b71c00cd6ce27ae335c299c8a6..0546e1e5e9015e7a597c9e59cf89ee614a260251 --no-merges --oneline
0546e1e5e Roll src/third_party/skia 33c1b315265c..52d8a5976a23 (1 commits) (flutter/engine#7941)

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* [Gallery] Fortnightly demo moved from flutter/samples.

* [Gallery] Fortnightly analysis corrections.

* [Gallery] Minor rename.

* [Gallery] Making floats ints.

* [Gallery] Fortnightly minor visual polish.

* [Gallery] Formatting.

* [Gallery] Upping package version for gallery to support fortnightly demo.

* [Gallery] Fortnightly copy correction.

* [Gallery] Fortnightly study polish.

* [Gallery] Fortnightly polish.

* [Gallery] Fortnightly copy correction.

* [Gallery] Fortnightly copy now held in '''.

* [Gallery] Fortnightly comment.

* [Gallery] Updates necessary when flutter_gallery_assets updates.

* [Gallery] Updating macrobenchmarks because we updated flutter_gallery_assets.

* [Gallery] Moving spaces to beginning of copy lines.

* [Gallery] Copy correction.

* [Gallery] Adding tooltip to satisfy smoke test.

* [Gallery] Minor pr feedback.

* [Gallery] Forced upgrade.

90fcaff90 Roll src/third_party/skia 2ed90e152d47..33c1b315265c (1 commits) (flutter/engine#7940) (#28413)


https://github.com/flutter/engine/compare/b1779e7d95ea...90fcaff9008e

git log b1779e7d95ea812ced2f4993932bdb2325f5a8ba..90fcaff9008e04b71c00cd6ce27ae335c299c8a6 --no-merges --oneline
90fcaff90 Roll src/third_party/skia 2ed90e152d47..33c1b315265c (1 commits) (flutter/engine#7940)

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https://github.com/flutter/engine/compare/0d777b947e4c...b1779e7d95ea

git log 0d777b947e4cc52a0bc17566f3e450f869ca00c9..b1779e7d95ea812ced2f4993932bdb2325f5a8ba --no-merges --oneline
b1779e7d9 Roll src/third_party/skia 867da4b96e8e..2ed90e152d47 (1 commits) (flutter/engine#7939)
018a4f783 Roll src/third_party/skia 12f1fecea947..867da4b96e8e (1 commits) (flutter/engine#7936)

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0d777b947 Roll src/third_party/skia 72f6f044cc73..12f1fecea947 (1 commits) (flutter/engine#7935) (#28392)


https://github.com/flutter/engine/compare/3efc9f5099e5...0d777b947e4c

git log 3efc9f5099e537b3885aacfe3506903c23c4e1ca..0d777b947e4cc52a0bc17566f3e450f869ca00c9 --no-merges --oneline
0d777b947 Roll src/third_party/skia 72f6f044cc73..12f1fecea947 (1 commits) (flutter/engine#7935)

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

*  Improvements for windows testing

* add2app test

3efc9f509 Roll src/third_party/skia 2a5511307d34..72f6f044cc73 (2 commits) (flutter/engine#7934) (#28387)


https://github.com/flutter/engine/compare/1741497a574f...3efc9f5099e5

git log 1741497a574fb5b23a32d11f7f499a3065009585..3efc9f5099e537b3885aacfe3506903c23c4e1ca --no-merges --oneline
3efc9f509 Roll src/third_party/skia 2a5511307d34..72f6f044cc73 (2 commits) (flutter/engine#7934)

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Delete unused 'persistent-storage' feature (which is being removed from
Fuchsia) and inclusion of '/system/data' in namepsace

https://github.com/flutter/engine/compare/5809adea4156...1741497a574f

git log 5809adea415605b821704967cd9e0b0fc05ce34a..1741497a574fb5b23a32d11f7f499a3065009585 --no-merges --oneline
1741497a5 Roll src/third_party/skia a753d1a3475d..2a5511307d34 (3 commits) (flutter/engine#7933)
0a50e0846 Roll src/third_party/skia ee1c8a733e5b..a753d1a3475d (16 commits) (flutter/engine#7930)
204e7da36 New setting to decide whether we want the engine to load ICU mapping. (flutter/engine#7928)
36d495d57 Dynamic patching support for native code libraries. (flutter/engine#7927)
21c59197e [re-land] Use all font managers to discover fonts for strut. (flutter/engine#7803)

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

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https://github.com/flutter/engine/compare/f80928a9e403...5809adea4156

git log f80928a9e403c6b2fc1b8de6a00bf6189b715c40..5809adea415605b821704967cd9e0b0fc05ce34a --no-merges --oneline
5809adea4 Make the layout of dynamic patch bundle similar to APK. (flutter/engine#7925)
e2a449a51 Move canvas clear after preroll (flutter/engine#7923)
8529dbc86 Remove unused FML file export.h (flutter/engine#7926)

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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)

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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.