BT: Return proper status of SHO process for UI update

The SHO retry mechanism has been moved to AVRCP for
serialization purpose.
Based on return from AVRCP and stack response, proper
status of SHO is returned to calling process.

CRs-Fixed: 2449154

Change-Id: I0c3aee6c15ae30e4be14dc8266311f0b15c9a217
1 file changed