* Embedding new diarams for API docs: Container, ListView, Align.

* Moving the diagrams to be enclosed within the snippet windows.

* Fixed wording for the alt image text.

Include the platformViewId of PlatformViews in the semantics tree. The accessibility bridge in the engine can use this id to steal the semantics nodes from the actual platform view and stick them into Flutter's semantics tree.

It is the iOS PlatformView counter part of https://github.com/flutter/flutter/pull/28953. It reverts the change in https://github.com/flutter/flutter/pull/28953/commits/5b5d6e89ec50f8f51766fb778d0e244f183a5000 and https://github.com/flutter/flutter/pull/28953/commits/03fd797eb8955561c2654b51035175202a25da9d.

https://github.com/flutter/flutter/issues/29302

Unblock the engine roll that includes the Dart roll that removes `-c`.

Documented CupertinoSwitch.value that it can't be null and added an assertion value != null in the constructor.

Related issue: #12948

Documentation that explains a common use case seen in Github issues where users were surprised by TextFormField growth to accommodate validation messages.

Remove the additional top padding from CupertinoPageScaffold's MediaQuery when the navigation bar is opaque (as the padding was already consumed by the navigation bar).

Related Issue: #29136

Avoids an implicit downcast + crash in MouseTracker, since the last
pointer event can be a Move or Down event, in addition to Hover.

The UserAccountsDrawerHeader had a bug with the arrow rotating whenever setState was called on its parent. This change makes sure that we check that the state actually changed before allowing the animation to trigger.

Fixes #25801

* Adding linking between higher and lower level classes in the API Docs. ref:#22859

* Fixed links between classes.

This PR limits the framework generated semantic node IDs to be smaller than 2^16, this allows to safely generate semantic node in the engine with IDs >= 2^16 avoiding ID collision (which is done in flutter/engine#8250).

https://github.com/flutter/engine/compare/af64f725f6c7...0d83a2ecd1bb

git log af64f725f6c74f5d1287a8be8511691119354088..0d83a2ecd1bb78f8e1f0ed9719ff3751cdfdd064 --no-merges --oneline
0d83a2ecd Roll src/third_party/skia 15dc59e65cfa..c5ee499f2c59 (2 commits) (flutter/engine#8298)
42d062f95 [fuchsia] Add missing trace macros (flutter/engine#8297)

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

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If the roll is causing failures, please contact the current sheriff (liyuqian@google.com), and stop
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https://github.com/flutter/engine/compare/dd6be2fd8371...af64f725f6c7

git log dd6be2fd83710de8392fb554927a5d495684a13e..af64f725f6c74f5d1287a8be8511691119354088 --no-merges --oneline
af64f725f Fixing links between higher and lower classes. (flutter/engine#8295)
22ee8ee08 Migrate existing embedder unit tests to use the fixture. (flutter/engine#8296)
345ae7d37 Delegate a11y events and action to/from embedded Android platform views. (flutter/engine#8250)

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

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We can remove the hack because https://github.com/flutter/engine/pull/8183
has been rolled into the framework.

https://github.com/flutter/engine/compare/3a445cec8a51...dd6be2fd8371

git log 3a445cec8a51056e5903c12659b6fc97138e57db..dd6be2fd83710de8392fb554927a5d495684a13e --no-merges --oneline
dd6be2fd8 Roll src/third_party/skia 42197c0bc68e..15dc59e65cfa (19 commits) (flutter/engine#8294)
d6ead18f4 Make it easy to write embedder unit tests by creating a fixture and config builder. (flutter/engine#8276)

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

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If the roll is causing failures, please contact the current sheriff (liyuqian@google.com), and stop
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https://github.com/flutter/engine/compare/dcc72c7176bc...3a445cec8a51

git log dcc72c7176bcaa9fc9fa3798542f764ca6fe4ebc..3a445cec8a51056e5903c12659b6fc97138e57db --no-merges --oneline
3a445cec8 Roll src/third_party/skia cd54466473fe..42197c0bc68e (10 commits) (flutter/engine#8292)
fcc63e7d0 Roll src/third_party/skia 2e2fa9e3a06b..cd54466473fe (2 commits) (flutter/engine#8291)
1b1209881 Roll src/third_party/skia c9f746cfb9f4..2e2fa9e3a06b (1 commits) (flutter/engine#8290)
b5813917f Roll src/third_party/skia e9a53fe3526a..c9f746cfb9f4 (1 commits) (flutter/engine#8288)

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

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

The @flutterio account now just directs people to @FlutterDev:

https://twitter.com/flutterio

dcc72c717 Roll src/third_party/skia d79c95e8bcf2..e9a53fe3526a (1 commits) (flutter/engine#8287) (#29874)


https://github.com/flutter/engine/compare/d2bba21af27a...dcc72c7176bc

git log d2bba21af27a8d3f30c66aa014f324c786f3fb4e..dcc72c7176bcaa9fc9fa3798542f764ca6fe4ebc --no-merges --oneline
dcc72c717 Roll src/third_party/skia d79c95e8bcf2..e9a53fe3526a (1 commits) (flutter/engine#8287)

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 (liyuqian@google.com), and stop
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https://github.com/flutter/engine/compare/9f878fcb3ecd...d2bba21af27a

git log 9f878fcb3ecdcc2c6ba0c6d958282c176f008183..d2bba21af27a8d3f30c66aa014f324c786f3fb4e --no-merges --oneline
d2bba21af Roll src/third_party/skia ab4c138c0ef3..d79c95e8bcf2 (2 commits) (flutter/engine#8286)
cee2bd732 Roll src/third_party/skia 97d957d1db65..ab4c138c0ef3 (3 commits) (flutter/engine#8285)
ef3cbe8ac Roll src/third_party/skia 4c0b5c4b79dd..97d957d1db65 (1 commits) (flutter/engine#8284)
bd4f6d726 Roll src/third_party/skia b1dbbc8509c6..4c0b5c4b79dd (2 commits) (flutter/engine#8283)
8d23b21d1 Roll src/third_party/skia 61bd91237778..b1dbbc8509c6 (2 commits) (flutter/engine#8282)
61838cab6 Roll src/third_party/skia ec1c6fdfdd11..61bd91237778 (1 commits) (flutter/engine#8280)

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

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

9f878fcb3 Roll src/third_party/skia e86cc5039026..ec1c6fdfdd11 (1 commits) (flutter/engine#8279) (#29836)


https://github.com/flutter/engine/compare/62c88d690272...9f878fcb3ecd

git log 62c88d690272f0b78047758bb9d8ffa8bbb870cc..9f878fcb3ecdcc2c6ba0c6d958282c176f008183 --no-merges --oneline
9f878fcb3 Roll src/third_party/skia e86cc5039026..ec1c6fdfdd11 (1 commits) (flutter/engine#8279)

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 (liyuqian@google.com), and stop
the roller if necessary.

62c88d690 Roll src/third_party/skia 33332f1e100c..e86cc5039026 (1 commits) (flutter/engine#8278) (#29832)


https://github.com/flutter/engine/compare/f8e3a40f9ba7...62c88d690272

git log f8e3a40f9ba701120724b5d6e8ff790d50f18083..62c88d690272f0b78047758bb9d8ffa8bbb870cc --no-merges --oneline
62c88d690 Roll src/third_party/skia 33332f1e100c..e86cc5039026 (1 commits) (flutter/engine#8278)

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 (liyuqian@google.com), and stop
the roller if necessary.

https://github.com/flutter/engine/compare/5f8ae420c1ac...f8e3a40f9ba7

git log 5f8ae420c1ac61bbbb26e61251d129c879fc788d..f8e3a40f9ba701120724b5d6e8ff790d50f18083 --no-merges --oneline
f8e3a40f9 Roll buildroot to 9c7b023ff266ee58b00fe60326fa1db910a087f3 (flutter/engine#8277)
c12696cc5 Roll src/third_party/skia f9264bac4e99..33332f1e100c (27 commits) (flutter/engine#8275)

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

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* Detect and cleanup leaky processes
* Add flaky tests for detecting leaked processes