* Add actions to AppBar sample doc

https://github.com/flutter/engine/compare/f4d23ef694a9...904cfc4fe363

git log f4d23ef694a9ab946d1a9ab97f20ec07b3878bd9..904cfc4fe3631103c656ba617d9768a832d3622a --no-merges --oneline
904cfc4fe Add @UiThread to MethodChannel and related classes/calls (#32642). (flutter/engine#8947)
c9406d45c Roll src/third_party/skia d696f8e6bca3..0221e8b22687 (5 commits) (flutter/engine#8948)
1b649a57d update docs (flutter/engine#8928)
47fd66c89 Terminate debug background task on expiry (flutter/engine#8930)
14c82d996 Only cache required frames (flutter/engine#8837)

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This relands flutter/flutter#31701 with missing const added

This reverts commit 549b4126.

https://github.com/flutter/engine/compare/839628b1e826...f4d23ef694a9

git log 839628b1e826138dfb485b484d1c6f8ef7442003..f4d23ef694a9ab946d1a9ab97f20ec07b3878bd9 --no-merges --oneline
f4d23ef69 Replace Skia font macros with enums. (flutter/engine#8920)

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839628b1e Roll src/third_party/skia 617d801ff762..d696f8e6bca3 (6 commits) (flutter/engine#8946) (#32635)


https://github.com/flutter/engine/compare/c454d2ef7fc5...839628b1e826

git log c454d2ef7fc5fb348e0d9a1ddca6cc69d916d61e..839628b1e826138dfb485b484d1c6f8ef7442003 --no-merges --oneline
839628b1e Roll src/third_party/skia 617d801ff762..d696f8e6bca3 (6 commits) (flutter/engine#8946)

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* Improve tabs documentation regarding matching lengths

* Add Tabs animation to docs

https://github.com/flutter/engine/compare/816d3fc58611...c454d2ef7fc5

git log 816d3fc58611d4980a992525d164c7c8711ace03..c454d2ef7fc5fb348e0d9a1ddca6cc69d916d61e --no-merges --oneline
c454d2ef7 Roll src/third_party/skia 695206d7149a..617d801ff762 (3 commits) (flutter/engine#8945)
8d126ce9f Roll src/third_party/skia 806621b2e0b5..695206d7149a (1 commits) (flutter/engine#8942)

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816d3fc58 New Plugin API PR1: Introduces PluginRegistry and FlutterPlugin, adds support for plugin registration to FlutterEngine. (flutter/engine#8826) (#32598)


https://github.com/flutter/engine/compare/21ad7f051cd3...816d3fc58611

git log 21ad7f051cd3138efde6625e45a52b7ba08c00cf..816d3fc58611d4980a992525d164c7c8711ace03 --no-merges --oneline
816d3fc58 New Plugin API PR1: Introduces PluginRegistry and FlutterPlugin, adds support for plugin registration to FlutterEngine. (flutter/engine#8826)

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21ad7f051 Move the Fuchsia Flutter Runner to //flutter/shell/platform/fuchsia/flutter (flutter/engine#8939) (#32593)


https://github.com/flutter/engine/compare/7553de25db1b...21ad7f051cd3

git log 7553de25db1b0906b70e1897e211090953f7d5ee..21ad7f051cd3138efde6625e45a52b7ba08c00cf --no-merges --oneline
21ad7f051 Move the Fuchsia Flutter Runner to //flutter/shell/platform/fuchsia/flutter (flutter/engine#8939)

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7553de25d Roll src/third_party/skia 5c7b54112bca..806621b2e0b5 (1 commits) (flutter/engine#8941) (#32579)


https://github.com/flutter/engine/compare/5526884e7878...7553de25db1b

git log 5526884e7878d0e1ce3eb650c1ec6769fc59ba9c..7553de25db1b0906b70e1897e211090953f7d5ee --no-merges --oneline
7553de25d Roll src/third_party/skia 5c7b54112bca..806621b2e0b5 (1 commits) (flutter/engine#8941)

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- Removes SYMROOT from the Generated.xcconfig. Having it causes current
  versions of Xcode to switch the project's build output to "Legacy",
  which causes anything not overridden to use a project-relative build
  directory instead of a shared directory in DerivedData, breaking
  anything with subprojects that it depends on.
  This means that `flutter run` and builds from Xcode will use
  completely different build directories, but that each should be
  internally consistent.
- Moves the FlutterMacOS.framework to $SRCROOT/Flutter. This is
  consistent with the approach we're moving to for all desktop
  platforms, and avoids issues finding it now that SYMROOT doesn't match
  for the two different build modes.

Fixes #32494

https://github.com/flutter/engine/compare/6e3c0431410c...5526884e7878

git log 6e3c0431410ce3ae1e1ee7cf8c139fefd34a6cde..5526884e7878d0e1ce3eb650c1ec6769fc59ba9c --no-merges --oneline
5526884e7 Wire up the Skia Metal backend on iOS. (flutter/engine#8936)
5ad986424 Roll src/third_party/skia 303bacbc0fcb..5c7b54112bca (2 commits) (flutter/engine#8938)
64481bd5d Roll src/third_party/skia 6e407986cd3b..303bacbc0fcb (2 commits) (flutter/engine#8935)

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Revert "Merge branch 'master' into master"

This reverts commit e3a03c04, reversing
changes made to 64749826.

https://github.com/flutter/engine/compare/3822aeccd93f...6e3c0431410c

git log 3822aeccd93f41ad96e7af0fc68ff141f7ce6f78..6e3c0431410ce3ae1e1ee7cf8c139fefd34a6cde --no-merges --oneline
6e3c04314 Synthesize buttons for embedders (flutter/engine#8873)

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https://github.com/flutter/engine/compare/710e9edda6a4...3822aeccd93f

git log 710e9edda6a4464214cc3215a3ca399e2f4a41c5..3822aeccd93f41ad96e7af0fc68ff141f7ce6f78 --no-merges --oneline
3822aeccd Prevent redundant layouts when floor(width) is the same (flutter/engine#8867)
0bc6dc974 Platform_views gesture: let flutter view controller be the media to pass the touches. (flutter/engine#8685)

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710e9edda Roll src/third_party/skia 6eeaf927e381..6e407986cd3b (4 commits) (flutter/engine#8933) (#32497)


https://github.com/flutter/engine/compare/bf17478a911b...710e9edda6a4

git log bf17478a911b133d54beed469adac90c91aa2c78..710e9edda6a4464214cc3215a3ca399e2f4a41c5 --no-merges --oneline
710e9edda Roll src/third_party/skia 6eeaf927e381..6e407986cd3b (4 commits) (flutter/engine#8933)

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## Description

These will help identify where the matrix starts to get wrong. 

Also fixed `RenderFittexBox` to no longer paint with empty child which previously triggered invalid matrix computations (NaN with dividing by 0). See also https://github.com/flutter/flutter/pull/7489

## Related Issues

https://github.com/flutter/flutter/issues/31650
https://github.com/flutter/flutter/issues/31700
https://github.com/flutter/flutter/issues/7431

## Tests

* RenderFittedBox does not paint with empty sizes

Make font semibold when isDefaultAction is true in CupertinoDialogAction

bf17478a9 Roll src/third_party/skia 4f6eb15178d8..6eeaf927e381 (12 commits) (flutter/engine#8932) (#32490)


https://github.com/flutter/engine/compare/d8646ed07cf3...bf17478a911b

git log d8646ed07cf3e836d390633abe389c18963a9285..bf17478a911b133d54beed469adac90c91aa2c78 --no-merges --oneline
bf17478a9 Roll src/third_party/skia 4f6eb15178d8..6eeaf927e381 (12 commits) (flutter/engine#8932)

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Revert "Cupertino localization step 12: push translation for all supported languages (#31644)" (#32470)

This reverts commit 10922df6.

https://github.com/flutter/engine/compare/f1f95f91df12...d8646ed07cf3

git log f1f95f91df12edab39f111ec764fccdc1627537b..d8646ed07cf3e836d390633abe389c18963a9285 --no-merges --oneline
d8646ed07 Fix the iOS accessibility tree structure of platform views. (flutter/engine#8731)
b3e32e730 Roll src/third_party/skia dbded16fadde..4f6eb15178d8 (7 commits) (flutter/engine#8922)

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https://github.com/flutter/engine/compare/644db5a49c35...f1f95f91df12

git log 644db5a49c35e952e6fa9ccbe722e98e982f7ec5..f1f95f91df12edab39f111ec764fccdc1627537b --no-merges --oneline
f1f95f91d Revert "Roll src/third_party/dart a0290f823c..c1e2df8f36 (3 commits)" (flutter/engine#8925)
27409dc1c [fuchsia] Guard out-of-tree Fuchsia targets to fix in-tree build (flutter/engine#8923)
6ed91ce8e Roll src/third_party/dart a0290f823c..c1e2df8f36 (3 commits)

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This implements a DefaultFocusTraversal widget to describe the focus traversal policy for its children, defined by a FocusTraversalPolicy object from which custom policies may be created. Pre-defined policies include widget-order traversal, "reading order" traversal and directional traversal.

This fixes a benchmark regression introduced in #32350. The performance is improved by just reverting the Layer.find<S> routines to use their old definitions, instead of defining them in terms of the findAll<S> lazy iterators.

Fixes #32387

I helped the daily mail debug a performance issue on I/O yesterday. Not
using the master branch could be wasting a lot of time due to old bugs.

* update immutable to const

* => const lists

* revert making list const

* make Centers const

https://github.com/flutter/engine/compare/3ef5007d90cf...644db5a49c35

git log 3ef5007d90cf270ecd280db807c855e4b15d7f51..644db5a49c35e952e6fa9ccbe722e98e982f7ec5 --no-merges --oneline
644db5a49 Standardize TimePoint implementaion on std::chrono (flutter/engine#8913)
1c8e31b4f Make sure Window.dpr still has a setter (flutter/engine#8912)
ad02f3cc1 Roll src/third_party/dart 678f4bb926..a0290f823c (1 commits)
ccfc02a8a Roll src/third_party/skia dfda5f57bf25..dbded16fadde (1 commits) (flutter/engine#8918)
f901126cc Roll src/third_party/skia b9330017c070..dfda5f57bf25 (2 commits) (flutter/engine#8917)
c12b917e9 Roll src/third_party/dart ef0c812b0d..678f4bb926 (11 commits)
ee45100b5 Roll src/third_party/skia 15c91422339a..b9330017c070 (11 commits) (flutter/engine#8915)
812616a67 Fix TimePoint on Windows (flutter/engine#8910)
30885db99 Roll src/third_party/dart f7bf890ff7..ef0c812b0d (13 commits)
78adbf78d Add web sdk implementation. (flutter/engine#8891)

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