Merge "[Output Switcher] Adjust casting volume in output switcher cause icons...

Merge "[Output Switcher] Adjust casting volume in output switcher cause icons to flicker" into sc-dev am: 2a96e3f0 am: 7d64f16f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14928725

Change-Id: I7b3538f9d0c7ad47e1621afeecf8319cb069ff15