Bluetooth: Changes for LPP

This patch includes implementation of a new Bluetooth
Adapter named QBluetoothAdapter for implementing LE
specific tasks that the default adapter doesnt perform.
This patch also implements Low power proximity.

CRs-Fixed: 581289

Conflicts:
	services/core/java/com/android/server/BluetoothManagerService.java

Change-Id: I63e0593f79c8929d4e18cee0472fcb401c8892e7