Reverting for b/158816279
Co-authored-by: NKaushik Iska <iska.kaushik@gmail.com>

Otherwise, this is a race condition.

Fixes https://github.com/flutter/flutter/issues/58785

Fixes https://github.com/flutter/flutter/issues/57636

This reverts commit d8fe71f6.

Co-authored-by: NAaron Clarke <aaclarke@google.com>

* running ios unit tests from felt by booting/shutingdown simulators. create simulator with felt

* changing the readme file for ios,mac,xcode spellings

* addressing reviewer comments

* fix analyse error

* fixing cleanup issue. solution: adding and await and using for loop instead of foreach

Updates the ANGLE checkout to the latest master. Among other things, picks up fixes for errors when building under Visual Studio 2019.

Part of fix for https://github.com/flutter/flutter/issues/48831

Fixes https://github.com/flutter/flutter/issues/57595

Fixes https://github.com/flutter/flutter/issues/54857

These aren't used by the model so are better managed outside of it.

Also, don't use `jsify` since it will turn the `Float32Array` into
a JS Array, which CanvasKit doesn't recognize as an SkColor.

* Add user agent for Chromium based Edge Browser to browser detection

* fix the comment left for the default return

Relanding of a change that was reverted in:
https://github.com/flutter/engine/pull/18427