Make BluetoothPbap implement BluetoothProfile (2/3)

* Changed methods names and signatures in Binder and service to support
getConnectedDevices(), getDevicesMatchingConnectionStates(),
getConnectionState()

* Add BluetoothDevice parameter to disconnect()

Test: test with carkits
Bug: 69417672
Change-Id: I47df76472937498659a09e22c89913e8284324ac