Merge "Remove support for ro.audio.silent" into main am: 4b18779def

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3369414

Change-Id: Ic07b1274af94ca7b889a79392f06e9be53d20209
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>