[automerger skipped] Merge "Added new constructor to AudioGroup." am: 3f75a845 am: 1778e161
am: b5cf5297 -s ours
am skip reason: change_id Ic7ca45d5fab27469a3cc8654cd05a10bd55f7e87 with SHA1 d5a71c7b is in history
Change-Id: I5b94c17d09d0540c9354978a65551d38992a2291