Remove reference counting and client death notification for master mute
Remove reference counting and client death notification for master mute

The use case for master mute is to toggle it on and off from a
KEYCODE_VOLUME_MUTE event, so this was unnecessary and prevented unmuting
in certain cases

Bug: 5724755

Change-Id: I041a112cd39e1c00dcae27e2266a95ce225e9b64
Signed-off-by: Mike Lockwood <368d0007e4626f70737d16df5e49ed8806b98c3f@google.com>

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base