Changed iOS channels to start cleaning up the accessibility handler when the bridge is deleted (#19556)

Started cleaning up the accessibility handler when the bridge is
deleted and made nilling out channels safer by making sure they don't
overwrite newly setup handlers.

Translate the coordinate from global flutterview to the specific embedded sub-view.

UIKit does not guarantee that the application is in the active state when it
lays out it subviews. However, in `viewDidLayoutSubviews`, Flutter attempts to
create the render surface and wait for the first frame. These operations require
GPU access which is forbidden when in the background on iOS. This layout while
in the background only seems to happen under very specific circumstances as
described in the reproducible test case. Notably, this behavior cannot be
reproduced when the application is just launched with the "Background Fetch"
XCode run scheme. The other instance of invocations to create the rendering
surface have been audited and I can confirm that those are already in the
correct lifecycle callbacks. This was the only instance where the surface
creation was in a non-lifecycle callback.

Fixes https://github.com/flutter/flutter/issues/55969
(This issue has a clear reproducible test case and was used as the basis for
verification.)
Fixes https://github.com/flutter/flutter/issues/57676
(This is significantly harder to reproduce but the issue looks to be the same. I
tried this patch on multiple devices overnight and could not reproduce this.)

This underlying cause here was identified by the enhanced GPU error reporting
introduced in iOS 14. I am not able to submit those patches because the Beta
builders are not available on infra. I will submit those when available so that
issues like this have more actionable error messages in the future.

Roll Dart from version 69aba23371ffb12caf596e29dab0d52f74a591e7 to 06cb010247fb9163db673ba2fd0b338ad6caafb8

dart-lang/sdk@06cb010247 Revert "Add unawaited to package:meta"
dart-lang/sdk@6de0f53e7c [CFE] Set correct async markers in outline phase (2nd try)
dart-lang/sdk@b6a0c50bf6 [dart2js] Support conversion of local function type variables from K to J model
dart-lang/sdk@0ce83987d6 Reland "[SDK] Adds an SDK hash to kernels and the VM."
dart-lang/sdk@315ecf2606 Roll benchmarks-internal to 88af52754f272e7a4c5737b7e003c2ed9e8a754f
dart-lang/sdk@3b25d6ff69 Add DynamicType, NeverType, and VoidType to API.
dart-lang/sdk@11632ff4d4 Add buildSdkSummary() to analyzer API.
dart-lang/sdk@431b57cbbb Add an additional category into completion_metrics.dart: parameter references
dart-lang/sdk@4140853675 [dart2js/ddc] Add null checks to with<X|Y|Z|W> methods
dart-lang/sdk@0d44449aaa Add unawaited to package:meta
dart-lang/sdk@be0f94b218 [dart2js] include dart:_js_annotations into the platform file by default
dart-lang/sdk@d9d4e5ccb3 copy package config changes to the modular_suite_nnbd.dart
dart-lang/sdk@9547628ecf [ddc] Compare types with new DartTypeEquivalence
dart-lang/sdk@f42889fbb8 create package_config.json files in ddc modular test suite
dart-lang/sdk@b4c60e6e1c [dart2js] Removing switch class restrictions.
dart-lang/sdk@935b69e676 [vm] Increase alignment in the blob container format to 16k.
dart-lang/sdk@901fa79db1 [vm] Prevent bare instructions code from clobbering decisions about which instructions to include.
dart-lang/sdk@1478b2b71c Prepare to publish analyzer 0.39.12
dart-lang/sdk@1a60f94fd0 Add two failing tests in the local_reference_contributor_test.dart, after some for(var foo ...) ^, the completion is in the implicit statement which is in the scope of the foo declaration.
dart-lang/sdk@1b1fcc0618 update package:test in the sdk
dart-lang/sdk@68bcf1b28a [dartdev] add --enable-experiment support to 'dart test'
dart-lang/sdk@34ad5a5908 Don't reuse LSP error code that triggers shutdown for refactor errors
dart-lang/sdk@5d1fbe0497 [cfe] Handle unforseen type parameter intersections
dart-lang/sdk@878e2cacdd [CFE] Don't issue an initialization error when trying to initialize when not having a platform
dart-lang/sdk@34f5c9d0b4 [cfe] Implement new async return rules
dart-lang/sdk@3a4aad6b87 [cfe] Use test description uri for expectation file location
dart-lang/sdk@fa650e46dd Implement the verbose option for dart analyze
dart-lang/sdk@b3c9e89028 Roll benchmarks-internal ee36753c0b4b..e6a5aa28c884
dart-lang/sdk@c40ebbc65e [ DartDev ] Ignore SIGINT in DartDev process
dart-lang/sdk@bda4994482 Analyzer: Finish using ///-style comments.
dart-lang/sdk@42d2996773 Analyzer: Move NON_BOOL_* tests to diagnostics/

Generate package config during gclient runhooks and update BUILD.gn to reference it

* Add flutter_windows_view and window_binding_handler

Switch input handling infra to FlutterWindowsView

win32_flutter_window implement WindowBindingHandler

Strip unneeded functionality from win32flutterwindow

Fulfill WindowBindingHandler interface in Win32FlutterWindow

Add implementations for missing input handling in Win32FlutterWindow

Cleanup dead code

Correctly hook up rendering again

Fix resizing

clang-format

Fix clipboard

Cleanup

Rename

Add comments

cleanup

* clang-format

* CR Feedback

* clang-format; gn format

* Fix licensing

* CR feedback

* CR feedback

* CR feedback

* Git rid of unnecessar :: prefixes

* Extract WindowBindingHandlerDelegate as an interface

* Missing file

* Extract physical window bounds as a struct

* CR Feedback

* CR feedback

* clang-format
Co-authored-by: NStuart Morgan <stuartmorgan@google.com>

This change makes it so that we track all the motion events encountered by `FlutterView` and all of its subviews in the `MotionEventTracker` class, indexed by a unique `MotionEventId`. This identifier is then passed to the Flutter framework as seen in https://github.com/flutter/flutter/pull/60930. Once the gestures take part in gesture disambiguation and are sent back to the engine, we look-up the original motion event using the `MotionEventId` and dispatch it to the platform.

Bug: https://github.com/flutter/flutter/issues/58837

* Move surface path code
* Update licenses_flutter
* dartfmt

The view_holder SetProperties and UpdateScene had incorrectly
specified flags for focusable and hit_testable. This change
fixes the order, similar to how child_scene_layer specifies it.
Co-authored-by: NSanjay Chouksey <sanjayc@google.com>

The latest version of meta now exports "unawaited", which conflicts with the
version of test_api currently used by web_ui.

This is an IWYU change that unblocks some Skia API shuffling.

This reverts commit fae8141f.

This reverts commit a974b781.