ASACORE-1062: Add option to bbsig to call LeaveSession()

Change-Id: I5e8f5fb0bf3840941a7fad4c93a1f7146e0c1233
Signed-off-by: Craig Dowell <cdowell@qce.qualcomm.com>
Merge "ASACORE-1062: Add option to bbsig to call LeaveSession()" into feature/udp_transport