* WIP

* Added tests and updated SafeArea implementation.

* Analyzer nits

* Review feedback

* Updated for SnackBar and PersistentFooterButton cases, added tests to check other potential spots.

* doc addition for SafeArea

* Typos

This allows us to override the behavior internally.

* Add generated Icon diagram to api docs

https://github.com/flutter/engine/compare/107fe823431a...3f4f606105a8

git log 107fe823431a64302b63179ad5147e592d33a17f..3f4f606105a8f6217cfbe08e193aa9a54b19dbef --no-merges --oneline
3f4f60610 Simplify loading of app bundles on Android (flutter/engine#9360)

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

* Add emulatorId to Android and iOS emulator devices

* Update docs

* Review tweaks

* Add tests for AndroidConsole for getting avd names

* Remove unused import

* Remove duplicated header

* Fix imports

https://github.com/flutter/engine/compare/ae8e6d9f4699...107fe823431a

git log ae8e6d9f46990b9585dc1fb5b8aabe491c08aaf3..107fe823431a64302b63179ad5147e592d33a17f --no-merges --oneline
107fe8234 Add --observatory-host switch (flutter/engine#9485)
20a76ded0 Roll src/third_party/skia ebbc82c02471..69881fb0b5fb (11 commits) (flutter/engine#9479)
00d929f7f Revert "IOS Platform view transform/clipping (#9075)" (flutter/engine#9480)
339001922 fix NPE when a touch event is sent to an unknown Android platform view (flutter/engine#9476)
ebb5b909f IOS Platform view transform/clipping (flutter/engine#9075)
13145e90c ios-unit-tests: Started using rsync instead of cp -R to copy frameworks. (flutter/engine#9471)

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

https://github.com/flutter/engine/compare/50b93f86beb0...ae8e6d9f4699

git log 50b93f86beb07189344d26358e7fc73b601ddc6f..ae8e6d9f46990b9585dc1fb5b8aabe491c08aaf3 --no-merges --oneline
ae8e6d9f4 Removed unused imports in new embedding. (flutter/engine#9463)

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

https://github.com/flutter/engine/compare/e29a1002888f...50b93f86beb0

git log e29a1002888f4d0a405c45d64a288eb472ce93df..50b93f86beb07189344d26358e7fc73b601ddc6f --no-merges --oneline
50b93f86b Roll src/third_party/skia e2439cc929f9..ebbc82c02471 (8 commits) (flutter/engine#9472)
2a7a355f1 Fixed logLevel filter bug so that filter now works as expected. (flutter/engine#9460)
f76d664e5 Test cleanup geometry_test.dart  (flutter/engine#9458)

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

https://github.com/flutter/engine/compare/b7dd1cdce95a...e29a1002888f

git log b7dd1cdce95aa5c097ee4f80fb65204e90a2e280..e29a1002888f4d0a405c45d64a288eb472ce93df --no-merges --oneline
e29a10028 Reland Update harfbuzz to 2.5.2 (flutter/engine#9462)
62acd7a44 Roll src/third_party/skia d8f79a27b06b..e2439cc929f9 (11 commits) (flutter/engine#9465)

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

* Add test case for Flutter Issue #27677 as a benchmark.

See https://github.com/flutter/flutter/issues/27677

I got the following results running the test on a Moto E2 which
will help us determine how much we can gain by analyzing the
operations and eliminating unnecessary repaints based on
dirty rectangles/regions.

no blurs       - avg 216.0 fps over 3 samples
blur the group - avg  22.9 fps over 3 samples
blur each txt  - avg   3.4 fps over 3 samples

* Added the new benchmark to be tracked on the dashboard.

https://github.com/flutter/engine/compare/b18847998196...b7dd1cdce95a

git log b18847998196a29fe66cc025ce0f8c9d76db6b20..b7dd1cdce95aa5c097ee4f80fb65204e90a2e280 --no-merges --oneline
b7dd1cdce ios-unit-tests: Fixed ocmock system header search paths. (flutter/engine#9469)
a6e5b10f2 Forgot a usage of a variable in our script. (flutter/engine#9467)
183a76b38 Added shebangs to ios unit test scripts. (flutter/engine#9464)
56954457a Don't hang to a platform view's input connection after it's disposed (flutter/engine#9423)
45ef6c8cf Remove unused/unimplemented shell constructor (flutter/engine#9459)

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

* Implement OutlineInputBorder BorderRadius scaling via RRect.scaleRadii

* Add regression test to test for border scaling

https://github.com/flutter/engine/compare/297cbd4b153b...b18847998196

git log 297cbd4b153bde91a821a2a07be36948df10ccbd..b18847998196a29fe66cc025ce0f8c9d76db6b20 --no-merges --oneline
b18847998 Remove variants of ParagraphBuilder::AddText that are not used within the engine (flutter/engine#9403)
a18403797 Send timings of the first frame without batching (flutter/engine#9424)
215096cc2 Roll src/third_party/skia 91032f8cd7ea..d8f79a27b06b (16 commits) (flutter/engine#9457)
52ebf4c42 Made sure that the run_tests script returns the right error code. (flutter/engine#9456)

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

Update the flutter_gallery Slider demo by aligning the text field in the first slider, adding range slider examples (including custom range thumbs), and separating single slider and range slider examples with tabs.

Fixes a bug in the Range Sider where the onChangeStart and onChangeEnd were not being called if the initial thumb selection came from a drag (rather than a tap).

https://github.com/flutter/engine/compare/4444c9cb6c9f...297cbd4b153b

git log 4444c9cb6c9f1859c1807cff415cd716bb9612ff..297cbd4b153bde91a821a2a07be36948df10ccbd --no-merges --oneline
297cbd4b1 Convert RRect.scaleRadii to public method (flutter/engine#9452)
14d2954a5 Eliminate unused import in FlutterView (flutter/engine#9439)
ccb5034d5 Generate weak pointers only in the platform thread (flutter/engine#9431)
da29c0473 Roll src/third_party/skia 6ce447a4ec20..91032f8cd7ea (5 commits) (flutter/engine#9455)

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

https://github.com/flutter/engine/compare/0f2ab22abb2c...4444c9cb6c9f

git log 0f2ab22abb2c8744be7cd5054f7a7b2af65eacd9..4444c9cb6c9f1859c1807cff415cd716bb9612ff --no-merges --oneline
4444c9cb6 Roll src/third_party/skia 089f13f98286..6ce447a4ec20 (1 commits) (flutter/engine#9453)
552a72932 Roll src/third_party/skia 38daf0be45e4..089f13f98286 (2 commits) (flutter/engine#9451)

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

0f2ab22ab Roll src/third_party/skia 8b5cf82dca37..38daf0be45e4 (1 commits) (flutter/engine#9448) (#34961)


https://github.com/flutter/engine/compare/1be3ee342c8f...0f2ab22abb2c

git log 1be3ee342c8f57d223b21e346803977a980e3ee3..0f2ab22abb2c8744be7cd5054f7a7b2af65eacd9 --no-merges --oneline
0f2ab22ab Roll src/third_party/skia 8b5cf82dca37..38daf0be45e4 (1 commits) (flutter/engine#9448)

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

https://github.com/flutter/engine/compare/a41243dcac62...1be3ee342c8f

git log a41243dcac62aa580a5dacd07a9e919b49b14de3..1be3ee342c8f57d223b21e346803977a980e3ee3 --no-merges --oneline
1be3ee342 Revert "Roll fuchsia/sdk/core/mac-amd64 from Cx51FRV5TCoqQ9nfs4E2QMfYkJ1JWt7arQXhV01tr7cC to w-3t4XiGPWI6UnY7zV2vTMAbS83-U8is0P168iq230oC (#9447)" (flutter/engine#9450)
c29d3bae4 Revert "Roll fuchsia/sdk/core/linux-amd64 from udf6w2VmM5E8PyQm5ggugW_jjiEdWs-Xl6efeLf2JdkC to jQ8awqEtcZVdusV29crejq9iQikDKImqn-HGtb4h3dwC (#9443)" (flutter/engine#9449)

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

Android now exclusively uses ELF shared libraries, and
iOS uses assembly.

https://github.com/flutter/engine/compare/5429f40bf8c1...a41243dcac62

git log 5429f40bf8c1fed4d6bdcb981b94eac02903b9d5..a41243dcac62aa580a5dacd07a9e919b49b14de3 --no-merges --oneline
a41243dca Roll fuchsia/sdk/core/linux-amd64 from udf6w2VmM5E8PyQm5ggugW_jjiEdWs-Xl6efeLf2JdkC to jQ8awqEtcZVdusV29crejq9iQikDKImqn-HGtb4h3dwC (flutter/engine#9443)
2a83c925f Roll fuchsia/sdk/core/mac-amd64 from Cx51FRV5TCoqQ9nfs4E2QMfYkJ1JWt7arQXhV01tr7cC to w-3t4XiGPWI6UnY7zV2vTMAbS83-U8is0P168iq230oC (flutter/engine#9447)
044b2c2a7 Roll src/third_party/skia 641d2b6e62d9..8b5cf82dca37 (1 commits) (flutter/engine#9444)

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

https://github.com/flutter/engine/compare/4b391cbe7e0a...5429f40bf8c1

git log 4b391cbe7e0a4c02fb46e7131749c9c5714bfbc4..5429f40bf8c1fed4d6bdcb981b94eac02903b9d5 --no-merges --oneline
5429f40bf Revert "Roll fuchsia/sdk/core/mac-amd64 from Cx51FRV5TCoqQ9nfs4E2QMfYkJ1JWt7arQXhV01tr7cC to e8sS_5Rpuo7cSjSWPCdxwTEAg2VbS9NPH2tjhBhPwsUC (#9442)" (flutter/engine#9446)
38078dfcd Roll fuchsia/sdk/core/mac-amd64 from Cx51FRV5TCoqQ9nfs4E2QMfYkJ1JWt7arQXhV01tr7cC to e8sS_5Rpuo7cSjSWPCdxwTEAg2VbS9NPH2tjhBhPwsUC (flutter/engine#9442)

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

https://github.com/flutter/engine/compare/c46d8c0a155a...4b391cbe7e0a

git log c46d8c0a155a433344dc4e0b65b7a6a23b3ea81b..4b391cbe7e0a4c02fb46e7131749c9c5714bfbc4 --no-merges --oneline
4b391cbe7 Roll src/third_party/skia 31d587474367..641d2b6e62d9 (1 commits) (flutter/engine#9441)
a98612600 Roll src/third_party/skia 6bbeb4ab7222..31d587474367 (1 commits) (flutter/engine#9440)

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

https://github.com/flutter/engine/compare/5153075e5fdf...c46d8c0a155a

git log 5153075e5fdfdbcdb2c7e9fae3743ca015c68773..c46d8c0a155a433344dc4e0b65b7a6a23b3ea81b --no-merges --oneline
c46d8c0a1 Update README.md for consistency with framework (flutter/engine#9428)

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

5153075e5 Roll src/third_party/skia f3881b278e69..6bbeb4ab7222 (1 commits) (flutter/engine#9438) (#34903)


https://github.com/flutter/engine/compare/d004bcd4d619...5153075e5fdf

git log d004bcd4d619fc3574761d63d7cf7b7291332c79..5153075e5fdfdbcdb2c7e9fae3743ca015c68773 --no-merges --oneline
5153075e5 Roll src/third_party/skia f3881b278e69..6bbeb4ab7222 (1 commits) (flutter/engine#9438)

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

https://github.com/flutter/engine/compare/fa16babc4537...d004bcd4d619

git log fa16babc4537967c065605e4e184b206869da1f6..d004bcd4d619fc3574761d63d7cf7b7291332c79 --no-merges --oneline
d004bcd4d Revert "Reland Update harfbuzz to 2.5.2 (#9406)" (flutter/engine#9437)
264d6d578 Reland Update harfbuzz to 2.5.2 (flutter/engine#9406)
f6389583f Ios unit tests choose engine (flutter/engine#9432)
8f20c1bd5 Roll src/third_party/skia 893403fb3896..f3881b278e69 (9 commits) (flutter/engine#9434)
6d2d9c88f Resolves embedding log chattyness by gating verbose, debug, and info logs by level (#34876). (flutter/engine#9425)

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

https://github.com/flutter/engine/compare/e32307e9f140...fa16babc4537

git log e32307e9f1409c9f0518956d9c695c1105565201..fa16babc4537967c065605e4e184b206869da1f6 --no-merges --oneline
fa16babc4 Use goma-aware Fuchsia clang toolchain (flutter/engine#9430)

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

https://github.com/flutter/engine/compare/a9a0b89b1c82...e32307e9f140

git log a9a0b89b1c82aa657708eece3e690bf39cf0ead5..e32307e9f1409c9f0518956d9c695c1105565201 --no-merges --oneline
e32307e9f Revert "Update harfbuzz to 2.5.2 (#9406)" (flutter/engine#9429)
780343a22 Update harfbuzz to 2.5.2 (flutter/engine#9406)
3757f1992 delegate checkInputConnectionProxy to the relevant platform view (flutter/engine#9426)
d9dfad3b8 Roll src/third_party/skia 8676929c0a13..893403fb3896 (6 commits) (flutter/engine#9421)
91e31dca5 Made the license check ignore the .vscode directory. (flutter/engine#9398)
24c3f513f Roll src/third_party/skia a1d26a807798..8676929c0a13 (9 commits) (flutter/engine#9416)
e33f83edb Roll src/third_party/skia e3beb99f39f0..a1d26a807798 (1 commits) (flutter/engine#9411)

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

* Prepare for HttpClientResponse Uint8List SDK change

An upcoming change in the Dart SDK will change `HttpClientResponse`
from implementing `Stream<List<int>>` to instead implement
`Stream<Uint8List>`.

This forwards-compatible change to `_MockHttpClientResponse` is being
made to allow for a smooth rollout of that SDK breaking change. The
current structure of the class is as follows:

```dart
_MockHttpClientResponse extends Stream<List<int>> implements HttpClientResponse {
  ...
}
```

This structure would require that the Dart SDK change land atomically
a change to the class (`extends Stream<Uint8List>`). This atomic landing
requirement doesn't play well at all with Flutter's roll model vis-a-vis
the Dart SDK's roll model to Google's internal repo.  As such, this commit
changes the structure of `_MockHttpClientResponse` to be:

```dart
_MockHttpClientResponse implements HttpClientResponse {
  final Stream<Uint8List> _delegate;

  ...
}
```

Once the Dart SDK change has fully rolled out, we can simplify this class
back to its former structure.

https://github.com/dart-lang/sdk/issues/36900

* Review comment