Make BluetoothPbap implement BluetoothProfile (3/3)

Change AIDL method signatures:
* Removed connect()
* Add BluetoothDevice parameter for disconnect()
* Rename other method names to be consistent with BluetoothProfile
methods

Test: test with PBAP carkits
Bug: 69417672
Change-Id: Ide81254d71128b9d204b63aa60bc39752add6edd