Merge "Clean up existing a11y listeners when reparenting." into rvc-dev am:...

Merge "Clean up existing a11y listeners when reparenting." into rvc-dev am: 4d3059c0 am: 2e7a1c94 am: e6bee965

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11707943

Change-Id: I7c55c5417254d6b46c531d96dc73db5bb3a98fda