close remote submix's output when device is not available.

- change output close logic to find the device from IOProfile rather than
  AudioPatch as AudioPatch handle can be cleared before disconnect.
- Otherwise, remote submix can be stuck as output is never closed and does not
  work any more as subsequent open fails as output is already taken.

bug: 18733215

Change-Id: Iddb481c91e81070e6be18996a4c8837dabd7ebdb