Merge "LE Audio State Machine and Native Interface boilerplate" am: 2b8f7373cf

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Bluetooth/+/1515503

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9dec18443affe73bfa1b987d4b89992a73c8694f