Add a property to enable the New AVRCP Profile (1/2)

You can now use the new AVRCP Profile by setting
persist.bluetooth.enablenewavrcp to true.

Also fix a misundestanding with connection_handler.cc. AVRCP Control
callbacks return a null address when disconnecting.

Bug: 68854188
Test: Check to see that the profile is used when property is true and is
      not used when property is false.
Change-Id: I4aa285c6bf009716cc80a80b813ba0acd3d8f9d8
(cherry picked from commit ce1a2b3f8d44a017c13a55b5e53abb51886297ad)
Merged-In: I4aa285c6bf009716cc80a80b813ba0acd3d8f9d8