am a3d5549c: am 098e58da: Use SystemClock.elapsedRealtime in ShutdownThread timeout logic

Merge commit 'a3d5549c802bc4fbf1e1ca05bc3552db17212036' into kraken

* commit 'a3d5549c802bc4fbf1e1ca05bc3552db17212036':
  Use SystemClock.elapsedRealtime in ShutdownThread timeout logic