Adds a note mentioning that this is still a release preview.

https://github.com/flutter/engine/compare/316f6365a64b...5646e86a6f44

git log 316f6365a64b..5646e86a6f44 --no-merges --oneline
5646e86a6 Use the internal_nodes_canvas for all leaf node operations. (flutter/engine#6804)
21c265cce Synchronize Flutter's rendering with CA. (flutter/engine#6807)
a64049a14 Update Vulkan headers to 1.1 (flutter/engine#6806)
f5e5d81ee Move the embedded view preview flag check to a common function. (flutter/engine#6813)


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, who should
be CC'd on the roll, and stop the roller if necessary.

* fixes wheel gradient and adds test

https://github.com/flutter/engine/compare/59f79d0d64c9...316f6365a64b

git log 59f79d0d64c9..316f6365a64b --no-merges --oneline
316f6365a Fix wrong `flutter/platform_views` protocol implementation on iOS. (flutter/engine#6803)


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, who should
be CC'd on the roll, and stop the roller if necessary.

New locale resolution algorithm to use full preferred locale list, include scriptCode in Locale. (#23583)

* 099b4eeada852df67ed5d36a638762de3a8fa079

* 59f79d0d64c915c6ba04099206e3fed5b9d5a4a1

Fixes https://github.com/flutter/flutter/issues/19273

b2479f8d2 Revert "Roll src/third_party/skia 06a477c3300d..dd650c40d148 (11 commits) (#6801)" (flutter/engine#6809)
16f8c67f0 Update paint hinting for upcoming Skia API changes. (flutter/engine#6802)
e011d544b Roll src/third_party/skia 06a477c3300d..dd650c40d148 (11 commits) (flutter/engine#6801)
47ef89ee5 Include vector in embedded_views.h (flutter/engine#6800)
a0efb9419 Make the FlutterPlatformViewFactory create FlutterPlatformViews. (flutter/engine#6782)
7ed4909fc Fix mDNS publishing for iOS simulator (flutter/engine#6789)
86d34e02d disable embedder_unittests (flutter/engine#6798)
01f6ad0fb Roll src/third_party/skia 5d58d09ae77d..06a477c3300d (5 commits) (flutter/engine#6797)
18ca035cf Discard embedded UIViews on hot restart. (flutter/engine#6772)
387ca2ef8 Add an internal_nodes_canvas to PaintContext. (flutter/engine#6728)

* Introduce a rounded InputBorder with no paint

* Update documentation for API

* Change name of Widget to NoStrokeInputBorder and updated documentation

* [FilledInputBorder] PR feedback.

* [FilledInputBorder] typo correction.

* [FilledInputBorder] Removing news.

* [FilledInputBorder] PR feedback.

* [FilledInputBorder] Removing use of borderSide.

* [FilledInputBorder] Adding tests for hashcode.

* [FilledInputBorder] Comments.

* [TextFields] Input decoration feature parity.

* [TextFields] Making floating of placeholder optional.

* [TextFields] Cleanup

* [TextFields] Removing unused isAnimated.

* [TextFields] Cleanup.

* [TextFields] Correcting border.

* [TextFields] Correcting comment.

* [TextFields] Comment.

* [TextFields] Corrections for tests.

* [TextFields] Cleanup.

* [TextFields] Cleanup.

* [TextFields] Tests.

* [TextFields] Cleanup.

* [TextFields] Cleanup.

* [TextFields] Formatting.

* [TextFields] PR feedback.

* [TextFields] PR feedback.

* [TextFields] PR feedback.

* Adds user account header arrow animation and test

https://github.com/flutter/engine/compare/70a1106b509e...22fc02028306

git log 70a1106b509e..22fc02028306 --no-merges --oneline
22fc02028 Roll src/third_party/skia fa8898747551..5d58d09ae77d (4 commits) (flutter/engine#6796)
d372d56ae Roll src/third_party/skia 23d1f94faac1..fa8898747551 (1 commits) (flutter/engine#6794)
8f105d79c Roll src/third_party/skia 2f8889b876d3..23d1f94faac1 (1 commits) (flutter/engine#6793)
0ce31d660 Roll src/third_party/skia 71bcc7d63f8c..2f8889b876d3 (1 commits) (flutter/engine#6792)
09ff6dc47 avoid overreleasing FlutterView (flutter/engine#6791)
bd793c011 Roll src/third_party/skia f49563bf9276..71bcc7d63f8c (3 commits) (flutter/engine#6790)
c8da28826 Roll Dart version to 9c07fb64c48adb3d6fde50bab6b8b641c5b67683 (flutter/engine#6788)
94dd7165e Skia Cleanup (flutter/engine#6786)
547b8585e Roll src/third_party/skia b52c273d3f05..f49563bf9276 (7 commits) (flutter/engine#6785)
b6f76e07a Delete unused license goldens and add check (flutter/engine#6784)


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, who should
be CC'd on the roll, and stop the roller if necessary.

* clarify widgetsapp docs

* Rename shadowed param, update doc

* pageContentBuilder

Reverts flutter/flutter#24111 as https://skia-review.googlesource.com/c/buildbot/+/167200 has been deployed.

We need to wait the fix in
https://skia-review.googlesource.com/c/buildbot/+/169724
to land in order to enable the rebase merge method again.

TBR: goderbauer

We'll land this quickly without waiting for presubmit checks
to unblock our engine roller.

* Move integration tests to use vm_service_lib
* Turn off debug logging that was accidentally committed
* Run update-packages --force to fix checksum for new dev dependency
* Trim trailing whitespace

This converts existing ## Sample code samples to {@tool sample}...{@end-tool} form.

Also:
1. Fixed a minor bug in analyze-sample-code.dart
2. Made the snippet tool only insert descriptions if the description is non-empty.
3. Moved the Card diagram to before the code sample.

* Document module pubspec

* update doc on plugin template

* clarify language

We have templates now.

https://github.com/flutter/engine/compare/2494abdda728...70a1106b509e

git log 2494abdda728..70a1106b509e --no-merges --oneline
70a1106b5 Unify copyright lines (flutter/engine#6757)
f9095fcc4 Roll src/third_party/skia 62cc5f581747..b52c273d3f05 (13 commits) (flutter/engine#6783)
4cdddbac4 Fix String comparison as if Java were Dart. (flutter/engine#6781)


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, who should
be CC'd on the roll, and stop the roller if necessary.

* Removes need for homebrew installation if all other packages are installed. Modifies test to work with this new functionality.

Also, remove old flags.

In order for this to take effect, https://skia-review.googlesource.com/c/buildbot/+/167200
needs to be landed and deployed.

The /bin/internal/engine.merge_method file controls how we merge a pull
request created by the engine auto-roller. If it's squash, there's only one
commit for a pull request no matter how many engine commits there are inside
that pull request. If it's rebase, the number of commits in the framework is
equal to the number of engine commits in the pull request. The latter method is
easier to detect regressions but cost more test resources.

* Include framework version in JSON output and adds test