Services: start PBAP and OPP like other services

PBAP and OPP are currently normal services that are started and stopped
by the system.  Have AdapterService start them just like all of the
other profile services instead.

Bug: 34395439
Fix: 35216901
Test: connect to a carkit that does PBAP
Test: use beam to receive a file
Change-Id: I84e769886f6aa4e698bd07fb9900f124111b50b3