Actually compile the codec config and declare the config as extern
or else it's just all 0.
Only acquire the transport when ACTIVE.
Implement transport state_change signal and acquire the transport
when going to pending/active.
Try to acquire the transport before we expose the device if we
can.
Force device expose when we get the device ServicesResolved=1 property
update.
Free transport when the rfcomm is closed.
Implement various DBus signals to detect dynamic property updates.
Use hooks for the implementation of the transport
Add events to the transport
Handle the destroy event of the transport to release the reference
in source and sink.
