BT: Multi A2dp support in Settings App.

1. The connected sinks are not disconnected from
A2dpProfile when new sink is connecting.
2. Also return correct connection status for
specific HS.
3. Sets priority for specific HS while disconnecting.

Change-Id: I56142d1527aa86d2bb47fb7166b2f3ab451d9b17

Bluetooth: Add support of two A2dp connections.

Audio Service will now manage two a2dp connections
and makes sure that BT a2dp connections are
consistently seen by other applications.
The change removes the BD address usage in BT
names, and uses a new Strin "BluetoothA2dp"
in order to show A2dp connected devices.

Change-Id: I59b8f8eff7bbc8033fcd46d0ac21d94ee338ca36
2 files changed