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

Merge "Merge "[Output Switcher] Disable volume control if route is volume_fixed" into tm-dev am: 25639f1b am: 53661edb" into tm-d1-dev-plus-aosp am: 8004fee0

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



Change-Id: I0a23ae31ef23b115941b73ebe32d2cb605d5d382
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>