[engine] Fix builds targeting Android from a Windows host gen_snapshot (#9190)

https://github.com/flutter/engine/compare/ddd36e8338ab...c2e8e806d7b8

git log ddd36e8338ab4c4369ec5d46c1085d8caad6fe9a..c2e8e806d7b89701f34a4f79037d66dc363cdc42 --no-merges --oneline
c2e8e806d Roll src/third_party/dart ff863afb16..7f146e431e (5 commits)
9e3078b9d Roll src/third_party/dart d10dffbfbf..ff863afb16 (7 commits)

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

* Fixed indent to properly add to the top and not to the start

* Updated Divider documentation

https://github.com/flutter/engine/compare/0602dbb27547...06dbe28e33e5

git log 0602dbb27547cd03d8f8e816b7995cace854f7e6..06dbe28e33e53aaaf765a5b32b5835d8a86b7563 --no-merges --oneline
06dbe28e3 Fix instantiateImageCodec api diff with web (stub) (flutter/engine#9234)
99240b7ad Remove unnecessary whitelisted flags for --dart-flags (flutter/engine#9233)
8eaddd606 Add web integration test to build_and_test_host (flutter/engine#9218)
a7fb7da34 Roll src/third_party/dart 9f2f5adb64..6d608fb52b (5 commits)
041c79114 Roll src/third_party/skia fe18de506097..14c8ca93db18 (11 commits) (flutter/engine#9231)
086b5a48d move webOnlyScheduleFrameCallback off of window (flutter/engine#9222)
8a6bad6ef Roll src/third_party/dart 40ef0c6d9f..9f2f5adb64 (4 commits)
91ee78068 Roll src/third_party/skia 6faf8d662af8..fe18de506097 (1 commits) (flutter/engine#9228)
828191990 Roll src/third_party/dart 6e0d978505..40ef0c6d9f (7 commits)
9dafb40a2 Roll src/third_party/skia 0e8362655a66..6faf8d662af8 (1 commits) (flutter/engine#9225)
e3b8b6120 Roll src/third_party/skia 3431d9d1dcc6..0e8362655a66 (2 commits) (flutter/engine#9223)
e80df363d Keyboard support for embedded Android views. (flutter/engine#9203)
2ec6dada6 Roll src/third_party/skia 6e4fee8c812e..3431d9d1dcc6 (17 commits) (flutter/engine#9221)

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

This is a small follow up to the previous AndroidX PR: https://github.com/flutter/flutter/pull/31028

This fixes an issue mentioned [here](https://github.com/flutter/flutter/issues/28805) where the androidX flag for a module is not set when creating a new project:

`flutter create --androidx -t module my_flutter`

Adds two new custom analytics dimensions: run_target_os_version and run_target_mode_name that are sent with each invocation of flutter run and show up in Google Analytics as "screens".

Reland "Text inline widgets, TextSpan rework (#30069)" with improved backwards compatibility (#34051)

This reverts commit ab707aca.

https://github.com/flutter/engine/compare/74975a4d1716...0602dbb27547

git log 74975a4d17162f23bea92ac298d1b96c2995a529..0602dbb27547cd03d8f8e816b7995cace854f7e6 --no-merges --oneline
0602dbb27 Roll src/third_party/dart 9dcb026b26..6e0d978505 (72 commits)

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

This reverts commit 14414f35.

This reverts commit 160a5680.

This will manually land https://github.com/flutter/engine/pull/8983 in
the framework.

Instead of sharing the iOS codepath that uses an ObjC generated plugin
registrant and expecting plugins to have an ObjC interface layer, switch
to generating a Swift registrant and expecting plugins to have a Swift
interface.

This means plugins on macOS that use Swift won't need an ObjC wrapper,
and plugins that use ObjC will need a Swift wrapper (inverting the
structure relative to iOS).

When an AndroidView gains focus we invoke the(newly introduced)
'TextInput.setPlatformViewClient' text_input system channel method
which sets the platform view as the text input target.

When the AndroidView loses focus we send a clearFocus message to
platform views system channel(so the engine can clear the focus from
the platform view).

This PR is going to land before the engine implementation is rolled to
the framework, we swallow MissingPluginException for the newly
introduced method channel methods so this is a no-op before the engine
is ready(after the engine is rolled with the corresponding change I'll
remove the logic to swallow the exceptions).

The engine counterpart is in: flutter/engine#9203

Moves the logic for finding vcvars64.bat to a new VisualStudio class
that encapsulates finding, and providing information about, VisualStudio
installations. Adds a validator for it, and runs it for Windows
workflows in doctor.

This wasn't included originally since it didn't seem to be necessary for
macOS in testing, but not having it breaks Swift plugins. This matches
the iOS Swift Podfile template.