Provide an API for apps to use a dynamic RFCOMM channel and SDP record.

Hide listenUsingRfcommOn(int channel)
Add listenUsingRfcomm(String name, ParcelUuid uuid)

The new API automatically finds a free RFCOMM channel and registers an SDP
record with the given uuid and name. The SDP record is automatically
removed when the socket is closed, or if the application dies.

Apps are prevented from registering SDP records with the uuid of system
Bluetooth profiles, such as A2DP, HFP and OPP.

Apps are prevented from removing SDP records that they did not create. This is
tracked by pid.

TODO: Provide an API for the connecting app to look up an SDP record.

Bug: 2158900
DrNo: eastham
Joke: "What did the dog say to the tree? bark."
Change-Id: Ia92f51c34615a7270a403255ad2b8faa98c4a3f5
9 files changed