Make sure there are no memory leaks in Flutter Framework. #134787
Description
This issue is linked in announcement for breaking change to track fixes for missed disposables.
Bigger issue: flutter/devtools#3951
- Not-disposed:
- First set of fixes for classes, instrumented for leak tracking: Clean up notDisposed leaks in Flutter Framework, phase 1. dart-lang/leak_tracker#134
- Second phase: Clean up memory leaks in Flutter Framework, phase 2. #137311
- Third phase: Clean up 'not disposed' memory leaks in FF, phase 3. #141198
- Not-GCed