Support for A2DP Sink and Proper initialization of profiles

 Support for A2DP Sink and Proper initialization of profiles

 - Register SDP and SEP (Stream End Point) for the profile
   whose init is called. We achieve this by making registration
   api aware of profile id being called.
 - Register A2DP Src + Avrcp Target + Avrcp Controller. We need
   to support Absolute Volume as well, so Avrcp Controller is
   required here.
 - Register A2DP Sink + Avrcp Controller. In this case we do not
   support absolute volume. Support would be added in AVRCP
   controller change
 - Adapter property is updated with profile ID for which init is
   called.This is required to make changes in btService for Profile
   initialization
 - Start listening for incoming AVRCP connection if we have
   only AVRCP Controller
 - Update default peer_features based on feature mask. In case
   of incoming AVRCP connection, SDP will be done later.
   In such a scenario default peer features sent to btif should
   be based on  features-set selected during initialization.
 - Drop Control, Meta and Browse commands when TG is not up.
 - Not to call AVRCP app callbacks when mentioned service is down.
 - Close audio socket on suspend

A2DP Sink: Support for AudioTrack

 - implemetation for audiotrack to take care of audio rendering
 - support for audio focus state in bluedroid

Bluetooth: Support for Avrcp 1.3  Controller

- support for SDP registration
- support for sending vendor dependant commands
- support for abs vol
- support for receiving vendor dependant response
- serialization of connection and rc_features callback

Avrcp_Ctrl: handling of commands and events for AVRCP Controller

- support of parsing cmd and event pdus
- timeout handling

Change-Id: I1e8d49b087eff6301373e1e90e8d868f15847c34