For https://github.com/flutter/flutter/issues/85700

This reverts commit bb3c49a9.

Roll Fuchsia from 275038b8be7196927b0f71770701f3c2c3744860 to 86a2f5264f8dc496dccdd4060e4bad4c33eef552 (#27077)

Update Fuchsia roll to include latest fidlc flag changes.

* Update buildroot to ignore new warnings from Clang package update

* Update clang versions to match the cipd rollers

* Update harfbuzz

* Fix another harfbuzz warning

* Update buildroot to exclude new warning flags from xcode

* Update licenses

* Resize synchronization shouldn't wait for vsync if window is hidden

This reverts commit 3283cafe.

Switch from `fml::NonOwnedMapping` to `fml::DataMapping`.

All other uses of `fml::NonOwnedMapping` are not in `PlatformView` and do not access data after references are out of scope.

This fixes https://fxbug.dev/77924.

* make processes interruptible
* make --watch compatible with Windows:
  * add 'q' shortcut to quit (Ctrl + C on Windows is wonky)
  * use package:path for cross-platform path processing