show connected devices or name of single device on Bluetooth Tile

Patchset 4: Add ACL listener to trace back connected/disconnected bt devices
            CleanUp
Patchset 5: Rebased
Patchset 6: Move ACL listener to BluetoothController

Change-Id: Ic9dda4f9123bc541753332df759cbd8534ab2e10

Conflicts:

	packages/SystemUI/res/values/cm_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/policy/BluetoothController.java