Revert "Revert "OBEX: Implementation of MAP and PBAP client role on Bluedroid.""

This reverts commit 5a0ed8a8e1c50919b8c80770334746199bcdacf6.
Let's not rename things and reduce their functionality arbitrarily.

Change-Id: I995b693a616737e3c6c92cf3cbc760cbc04187ec