display: replace VOUT_DISPLAY_CHANGE_ZOOM/DISPLAY_FILLED by VOUT_DISPLAY_CHANGE_SOURCE_PLACE
They are notified for the same reason and the receivers don't do more than handling a placement of the video.
VOUT_DISPLAY_CHANGE_SOURCE_CROP
and VOUT_DISPLAY_CHANGE_SOURCE_ASPECT
should follow as they also only change the placement of the video in the display. But the android display module needs to be reworked first.