Ensure that we timeout waiting when starting the PiP menu activity

- In some cases we don't get notified when the menu activity start is
  interrupted.  In such a case, we should timeout and allow for the next
  menu activity start to complete, and log the issue.

Bug: 63752800
Test: Artificially induce missed callback, ensure that we can still
      launch the PiP activity afterwards.

Change-Id: Id92890a53ce47c4e9f593a5434fd8f9137468799