Resolve incoming pairing and connection issue

When the remote side initiates pairing & connection, occassionally
connection is made before the phone has had a chance to do SDP.
In this case, the profile priorities are not initialized, which caused
us to incorrectly reject the incoming connection. Allow connection
if priority is undefined, but device is not unpaired

Change-Id: Icd8257adea19fc9a4d3853cd85da9bd791cfe505

Conflicts:

	src/com/android/bluetooth/a2dp/A2dpStateMachine.java