bf3dde7ed6
Making changes to AppWidgetHost and AppWidgetHostView to make sure
1. We could make further changes the implementation of the listener in
launcher
2. There is backward compatibility by making AppWidgetHostView a
listener
Design doc: https://docs.google.com/document/d/1QpTYeOvbpGlcOLe26BtMmpaN2_rG-EC1vn4eNo89zZs/edit?usp=sharing
Test: N/A
Bug: 235358918
Change-Id: I8c3cd4eee86d93dfdeb14b0dd6d086a49e1b3b18