Merge "Add content description for output switcher chip" into sc-dev am:...

Merge "Add content description for output switcher chip" into sc-dev am: c970cc4a am: 1267f269 am: fd13f436

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15109833

Change-Id: I356c61a3d9eaccea0c9638d1ffb276c580bac055