AVRCP Browsing large playlist support

When browsing large playlists with aproximately 1k entries the intent
that delivers content between the AVRCP Controller and Media Browser
Service could grow excessively large.  This patch moves that data into a
service call.

Bug: 72496280
Test: Browse all songs directory with 5000 items.
Change-Id: Ic252ee0b21bb42194a81548ad9af03fd0e86e002