Workaround for input ANR, always finish PiP menu activity.

- Always finish the PiP menu activity when the interaction is complete
  (either the menu is hidden after showing, or when the user stops
  interacting with it and it was shown for the dismiss overlay)
- Fix issue with bounds animation callback not working due to the app
  window being removed and not updating the app transition that its
  animation "finished"
- Add additional logging throughout to trace PiP animation

Bug: 36877782
Test: Enter PIP, tap to show menu, wait for it to hide, and then use
      wired headset button

Change-Id: Ie88ba107d7fffdd182a4063ef4f324b58669d0ad