AVRCP 1.5 implementation

AVRCP 1.5 Implementation.

Change-Id: I9a21348ec7e0c21735448ea29b781167f01e1580

Bluetooth: Add Total track number.

Add support to add total number of tracks in
Meta-data

Change-Id: I5b1287f791615adcd4f920fe5c7cae0c7c7b04ea
CRs-Fixed: 627869

Bluetooth: Modify Avrcp 1.5 implementation to adapt to latest AOSP changes

Modify Avrcp 1.5 implementation to adapt to latest AOSP changes.

CRs-Fixed: 719567
Change-Id: I0958fb12f573054f1da16df0ac46f3bec7374222

Move media player list management to Audioservice

Move media player list management to Audioservice so that
list is retained even after BT restart.

Change-Id: Ia2455e6def1900b4af2225c50e1b5325a7ce1a98

Update RemoteController on Session update

Update RemoteController on Session update in order to update
AVRCP player list to honor peer initiated browsing command.
This change fixes AVRCP browing failure due stale entry of
player session upated to AVRCP player list after device reboot.

Change-Id: I529a13e2c8a70e4b53319798c952b41f369b8bec

Introduce new interface class for Avrcp Browsing feature

Separate out Avrcp Browsing Apis from SDK interface class to
ensure compatibility with all available apps implementing the
mentioned SDK interface class.

Bluetooth: Access mediaplayerlist in synchronized way

Access mediaplayerlist in synchronized way to make sure no transient
update is tried to be worked upon in multithreaded environment.

Change-Id: I0e7810ac89e0ddc19d57b32c679450aa7cb87273
CRs-Fixed: 979840

Conflicts:
	media/java/android/media/IAudioService.aidl

Change-Id: I713527ee3622ba28fe92d5bc743b9471632299b3