https://developer.android.com/reference/android/view/SurfaceHolder.Callback2

If we use the surfaceRedrawNeeded, we can synchronously block and not need the hack here:

https://github.com/flutter/engine/blob/d9fc7f02104b2bf04301b07c5d1c2cd0fe2421d1/shell/platform/android/io/flutter/embedding/android/FlutterSurfaceView.java#L138-L140

And

https://github.com/flutter/engine/blob/d9fc7f02104b2bf04301b07c5d1c2cd0fe2421d1/shell/platform/android/io/flutter/embedding/android/FlutterSurfaceView.java#L87-L88

/cc @johnmccutchan fyi