Disable the automatic "pub get" if the project is using a third-party tool for linking dependencies. (#86177)

* add a check for env variable RELEASE_CHANNEL in dev/snippets/lib/main.dart during doc generation
* update to LUCI_BRANCH, which is already populated
* validate env variable is either master or stable

When suggesting more performant alternatives to rebuilding `Opacity`, `FadeTransition` is as valid as `AnimatedOpacity`, and it's less obvious ("opacity" versus "fade").

f726c319a [camera] Fix coordinate rotation for setting focus- and exposure points on iOS (flutter/plugins#4158) (#86542)

This reverts commit a67f618a.

* a7b5522de refactor and simplify CI dart analysis (flutter/engine#27370)

* 137009bac Switch test_suites to yaml. (flutter/engine#27368)

* a22a3ca12 [web] fix a few analysis lints (flutter/engine#27375)

* a02c01776 make it work on <API 24 (flutter/engine#27398)

* 022025691 Make FlutterFragment usable without requiring it to be attached to an Android Activity. (Attempt 2) (flutter/engine#27397)

* 51e07a502 [fuchsia] Use FFI to get System clockMonotonic (flutter/engine#27353)

* 4015d8b52 Roll Skia from 224e3e257d06 to 773a0b8c7e74 (44 revisions) (flutter/engine#27399)

* 7db1a9602 [ci.yaml] Add Linux Android Scenarios postsubmit (flutter/engine#27400)

* a02f6bce4 remove the use of package:isolate (flutter/engine#27401)

* 3237f4f03 Roll Skia from 773a0b8c7e74 to 36c1804e8f5c (1 revision) (flutter/engine#27402)

* 75af7c8ac Roll Dart SDK from ab009483f343 to 746879714c96 (5 revisions) (flutter/engine#27403)

* be21e40f3 [ci.yaml] Add linux benchmarks, add enabled branches (flutter/engine#27405)

* c8d7a97c1 Roll Fuchsia Mac SDK from wUg-tGGCL... to uhahzGJ6H... (flutter/engine#27408)

* 364920036 Roll Skia from 36c1804e8f5c to 947a2eb3c043 (7 revisions) (flutter/engine#27410)

* f04d941f4 [web] enable always_specify_types lint (flutter/engine#27406)

* bdaaa4f5d [fuchsia] fix race in DefaultSessionConnection (flutter/engine#27377)

* 84247f262 Update the Fuchsia runner to use fpromise instead of fit::promise (flutter/engine#27416)

* 39119d26c Roll Skia from 947a2eb3c043 to 9081276b2907 (6 revisions) (flutter/engine#27426)

* 9002bc781 Roll Skia from 9081276b2907 to 0547b914f691 (2 revisions) (flutter/engine#27430)

* 58e068880 Roll Fuchsia Linux SDK from hykYtaK7D... to s2vrjrfuS... (flutter/engine#27431)

* 1dca88763 Roll Dart SDK from 746879714c96 to d53eb1066384 (2 revisions) (flutter/engine#27432)

* c9008f33c Use python to run firebase testlab, do not expect recipe to know location of APK (flutter/engine#27434)

* 8f7c5294d Roll Skia from 0547b914f691 to 7d336c9557bd (3 revisions) (flutter/engine#27436)

* 534404e64 Roll Fuchsia Mac SDK from uhahzGJ6H... to TWPguQ-ow... (flutter/engine#27438)

* 9f13308eb Roll Dart SDK from d53eb1066384 to fcbaa0a90b4b (1 revision) (flutter/engine#27439)

* e5e7b943d Roll Skia from 7d336c9557bd to 7dc26fadc90b (2 revisions) (flutter/engine#27440)

* bf3d26517 Roll Skia from 7dc26fadc90b to dd561d021470 (1 revision) (flutter/engine#27442)

* 6e62915bf [ci.yaml] Add xcode property to ci.yaml (flutter/engine#27415)

* 33c17a1ec Roll Skia from dd561d021470 to 0e99fbe5da5c (1 revision) (flutter/engine#27443)

* 0bc247932 Adjust web_sdk rule deps (flutter/engine#27435)

* 7a8969a7a [web] enable prefer_final_locals lint (flutter/engine#27420)

* 590902b8b Roll Dart SDK from fcbaa0a90b4b to 207232b5abe0 (1 revision) (flutter/engine#27446)

* 283a42f98 fuchsia: Log vsync stats in inspect (flutter/engine#27433)

* 4af14b9d4 Deeplink URI fragment on Android and iOS (flutter/engine#26185)

* 47899dbac Remove unused generate_dart_ui target (flutter/engine#27445)

* fb265c2a8 Roll Skia from 0e99fbe5da5c to a2d22b2e085e (3 revisions) (flutter/engine#27447)

* 8bb5760c0 [ci.yaml] Mark Linux Android Scenarios as flaky (flutter/engine#27422)

This reverts commit d056500b.

* Fix sorting

* Update icons.dart

* [Fonts] Use instead matching instead of prefix

* Add new

* Fix sorting

* Update icons.dart

This PR updates the ID used by logical keyboard keys.

The logical key ID is still composed of 2 parts: 32 bits of value, and 8 bits of plane. But the assignment of planes has been drastically changed. HID plane is removed, and unprintable plane and Flutter plane are added. This is to reflect the new generation method for logical key IDs. Now keys that are defined by Flutter but not by dom_key_data are placed into the Flutter plane, including numpad keys, sided modifier keys, and gamepad keys. The values for platform planes have also been adjusted.

The generation script and README have been updated accordingly as well.

A new file, test_utils/key_codes.h is now generated to assist engine unit testing.

All lists generated by the script are now sorted by the key.