am c8d0d630: Merge "Fix issue 2909189: System property ro.audio.silent no longer mutes system." into gingerbread

Merge commit 'c8d0d6307fc5cdd24083113456ac33790a5fb94a' into gingerbread-plus-aosp

* commit 'c8d0d6307fc5cdd24083113456ac33790a5fb94a':
  Fix issue 2909189: System property ro.audio.silent no longer mutes system.