Merge "audio: Clarify "mute" behavior for playback parameters" into main am: 76ed904cd8

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3420885

Change-Id: I11491e9fdb7ceefb7352d32b724152c7106f4335
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>