Update profiles to consider null identity address

Add helper method to call into for profiles that connect over BR/EDR
transport, to accommodate the behavior correction where identity address
can be null.

Bug: 317120534
Bug: 295907764
Bug: 323148948
Test: m com.android.btservices
Test: Manual; connect A2DP device bonded using settings (so bonded over classic first) and ensure no crash with flag enabled.
Change-Id: Idd69ef1bf503c455ece7c4a74487442eddc4bbbd