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 am: d0bbedd6

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

Change-Id: I6c11208e32790bbdbc1dbf1c1267b9e5bdb9a90d