Merge "[Output Switcher] Disable volume control if route is volume_fixed" into...

Merge "[Output Switcher] Disable volume control if route is volume_fixed" into tm-dev am: 25639f1b am: cd00434b am: fd9a4aef am: 0a567371

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18756771



Change-Id: Ia1d73d8a8bd8f899ce79280fc40ec72e9a0fa641
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>