IBluetooth: remove dump(), support arguments

Because IBluetooth is a Binder service, we don't need dump() to
support dumpsys, just call the IBinder.dump().

Change-Id: Idcd48f758427b824e0b7eaafd091ba3fb2ff8993
(cherry picked from commit adbb3ff062e039b2552c6b5ded92e56346ac3934)