bass_client: Keep real sink address type of receiver states

Currently there is no usage of address type from receiver state object.
To be consistent with real source address type a valid value needs to be
kept.

Tag: #Bug
Bug: 328065146
Bug: 316005152
Test: atest BassClientStateMachineTest
Change-Id: Iae303d065a3309825d5a9754d136b02aebc72711