This implements focus and hover handling for Material buttons. It inserts Focus widgets into the tree in order to allow buttons to be focusable via keyboard traversal (a.k.a. TAB traversal), and Listener widgets into the InkWell to allow the detection of hover states for widgets.

Addresses #11344, #1608, and #13264.

This fixes propagation of needsCompositing from child widgets.

When needsCompositing is turned on by a child widget, it necessarily sets the needsCompositing bit of its parent widget, but RenderPointerListener was ignoring that piece of information and only turning on compositing if it thought it needed it for itself.

This corrects that, and adds a test for the condition, and updates a test that was affected by the change.

Fixes #32525 (again)

832cdacc6 Roll src/third_party/skia 4167215daf0e..c8a84d2b7ff9 (9 commits) (flutter/engine#8964) (#32722)


https://github.com/flutter/engine/compare/d0dc9b94d4a9...832cdacc6f95

git log d0dc9b94d4a9a3657c6717ba16b7590f273fe1e1..832cdacc6f955f080734109900a1658ae7e0d248 --no-merges --oneline
832cdacc6 Roll src/third_party/skia 4167215daf0e..c8a84d2b7ff9 (9 commits) (flutter/engine#8964)

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Eliminates the need for a build.bat in the Windows build workflow, adding
preliminary support for building using msbuild. The handling of
vcvars64.bat may be refined in the future, but this serves as a starting point.

https://github.com/flutter/engine/compare/66087301cd9a...d0dc9b94d4a9

git log 66087301cd9a18ad2c2087412c71f552a2ec76c2..d0dc9b94d4a9a3657c6717ba16b7590f273fe1e1 --no-merges --oneline
d0dc9b94d Rename frame_time and engine_time (flutter/engine#8952)

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Added 'enabled' property to the PopupMenuButton to allow the button to be disabled in the case where the menu would be empty.

https://github.com/flutter/engine/compare/a89cf80d4de5...66087301cd9a

git log a89cf80d4de5dbd93d72958cd1f0b26eb6a0b3e2..66087301cd9a18ad2c2087412c71f552a2ec76c2 --no-merges --oneline
66087301c Roll tonic and update #includes (flutter/engine#8950)
a89531561 Roll src/third_party/skia c2aea5938d0d..4167215daf0e (5 commits) (flutter/engine#8961)

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Add a more meaningful message to the assertion on children property of MultiChildRenderObjectWidget and SliverChildListDelegate. (#32487)

* Updating dart.dev related links

* Update packages/flutter_tools/lib/src/base/context.dart

This reverts commit 18ca3754.

a89cf80d4 Roll src/third_party/skia 136ad09848f5..c2aea5938d0d (1 commits) (flutter/engine#8958) (#32700)


https://github.com/flutter/engine/compare/4238163010cc...a89cf80d4de5

git log 4238163010cc4f5d988c7737501a9387cd0c6560..a89cf80d4de5dbd93d72958cd1f0b26eb6a0b3e2 --no-merges --oneline
a89cf80d4 Roll src/third_party/skia 136ad09848f5..c2aea5938d0d (1 commits) (flutter/engine#8958)

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423816301 Roll src/third_party/skia 4e66df54e7da..136ad09848f5 (2 commits) (flutter/engine#8957) (#32685)


https://github.com/flutter/engine/compare/49bc9c86c967...4238163010cc

git log 49bc9c86c967cb3b57e211f5e03868dd7147984a..4238163010cc4f5d988c7737501a9387cd0c6560 --no-merges --oneline
423816301 Roll src/third_party/skia 4e66df54e7da..136ad09848f5 (2 commits) (flutter/engine#8957)

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Added diagnostic output for needsCompositing to RenderObject diagnostics output.

49bc9c86c Roll src/third_party/skia 0221e8b22687..4e66df54e7da (5 commits) (flutter/engine#8955) (#32671)


https://github.com/flutter/engine/compare/5ac2d02645a2...49bc9c86c967

git log 5ac2d02645a240609b319aaead5ccb1fb845fa02..49bc9c86c967cb3b57e211f5e03868dd7147984a --no-merges --oneline
49bc9c86c Roll src/third_party/skia 0221e8b22687..4e66df54e7da (5 commits) (flutter/engine#8955)

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https://github.com/flutter/engine/compare/c83ec26f351f...5ac2d02645a2

git log c83ec26f351fed56341a8959d1d711c7ec2fe423..5ac2d02645a240609b319aaead5ccb1fb845fa02 --no-merges --oneline
5ac2d0264 Avoid disabling sources assignment filters are these have been removed. (flutter/engine#8954)
51486a549 New Plugin API PR2: Introduces ActivityAware, ActivityControlSurface, and ActivityPluginBinding. (flutter/engine#8943)
b3b817a9b Add a minimal set of symbols to the dynamic symbol table for Linux executables (flutter/engine#8937)
96ffc893e Copy the Dart Runner from //topaz into the engine. (flutter/engine#8949)

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https://github.com/flutter/engine/compare/904cfc4fe363...c83ec26f351f

git log 904cfc4fe3631103c656ba617d9768a832d3622a..c83ec26f351fed56341a8959d1d711c7ec2fe423 --no-merges --oneline
c83ec26f3 Roll Tonic (flutter/engine#8940)

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This fixes #32525, because it now marks the compositing bits as needing to be recalculated if the mouse tracker changes its idea of whether or not a mouse is attached.

This bug occurred because the test framework was leaking state from one test to the next (the state about whether a mouse pointer was active), and so even though there was a "passing" test when run in order with the other tests in the file, when the test was run individually (or first), it would have failed and caught the bug.

This adds an assert to make sure that after each test there are no simulated mouse pointers connected, and now calls removePointer in all of the tests where this was a problem.

Some parts of the appbundle build process were based on the logic for building
APK packages.  However, these steps (copying to a directory shared by all
build variants, and calculating a SHA) are not necessary for an appbundle.

* 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.