Merge "Merge "Merge "Clear preferred feature when unregistering MediaRouter2"...

Merge "Merge "Merge "Clear preferred feature when unregistering MediaRouter2" into rvc-dev am: e7ae4947 am: 1fc43635" into rvc-d1-dev-plus-aosp am: 26cf0af8" into rvc-qpr-dev-plus-aosp am: a64f403e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11846909

Change-Id: I3ae9dd88e4474c24a3fd1696f50f7e76ee399241