Add audio.r_submix.default for casting

Change-Id: Ia4c0022881b1850d85459a7117e71b8048a0a55b
Revert "revert: camera: include support for face detection"

This reverts commit 3e47d6efb007c907274df5aa5ac72dc4ad1907d0.
Video snapshot & Optimizations

Change-Id: Ifb001b5854bb47c5af74a9b5d0e63b224aa901aa