Add audio.r_submix.default for casting

Change-Id: Ia4c0022881b1850d85459a7117e71b8048a0a55b
Video snapshot & Optimizations

Change-Id: Ifb001b5854bb47c5af74a9b5d0e63b224aa901aa
Merge remote-tracking branch 'dokdo/cm-11.0' into cm-11.0