There are some cases where onAnimatorDraw gets called before
onAnimatorBeginFrame, in these cases we need to update the
latest_frame_target_time to be the target time for the current frame.

This manifested as an issue in release mode Android builds:
https://firebase.corp.google.com/project/flutter-infra/testlab/histories/bh.27c33c672e9b01f2/matrices/4903344583855476919/executions/bs.ee4f6f7ad8671a34

This is the term used in the Dart code and which callback is more commonly used
in GLib matching the Dart code will make developers life easier.

Added a new `FlutterEngineAOTData` argument to `FlutterProjectArgs`. Embedders can instantiate and destroy this object via the new `FlutterEngineCreateAOTData` and `FlutterEngineCollectAOTData` methods provided.

If an embedder provides more than one source of AOT data to `FlutterEngineInitialize` or `FlutterEngineRun` (e.g. snapshots as well as `FlutterEngineAOTData`), the engine will error out.

Resolves: https://github.com/flutter/flutter/issues/50778

This was accidentally removed in https://github.com/flutter/engine/pull/18182

This fixes https://github.com/flutter/flutter/issues/56722

* make compiler worker count configurable

go/flutter-pipeline-improvements for more details.