1. Set the LE Audio unicast offload property
2. Add the offload capability file for unicast
Bug: 257377483
Test: Manual
Change-Id: If6233bfcefa8894f52d0a8c7799ffa5b6b786f53
* set BtBqrEventMaskOverride value to 262238 in bt_vendor_overlay.conf
to disable firmware BTRT logging.
Bug: 251375105
Test: manual
Change-Id: I8172d18c82f4160768c8226bb7a845f7058ee495