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: ef328273 am: 64f67d08

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

Change-Id: I12947cd61c4087fad613ca33a933240c2554e9d9