Making magnified window move to top boundary of screen

Set the cutout mode of the magnified window to
LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES,
then this window is allowed to extend into the
cutout areas on the short edges of the screen.

Bug: 145252526
Test: manual test
Change-Id: I7952bd8e0069994d90d3ea207095c827c33c06be