AudioPolicyManager: handle outputs for different addresses

Add the notion of device types that cause the device address
  to be taken into account, i.e. multiple devices of the
  same type but with a different address can be connected/
  disconnected.
AUDIO_DEVICE_OUT_REMOTE_SUBMIX is such a device type.
When making those devices available / unavailable, look for
  all outputs with a matching address.

Bug 16009464

Change-Id: I260f8248b7794c4932094e876afdf29fdea007a3