Use displayId to determine CHANGE_ACTIVE_SCREEN

- Currently CHANGE_ACTIVE_SCREEN is dispatched when rotating too, which is incorrect. mScreenSizeDp is different in portrait and landscape, and varies more than swapping width/height due to different insets applied. Therefore, use the change of unique display id as a signal instead.

Fix: 202366729
Test: Rotate device, overview stays
Test: Unfold devices, overview goes away
Change-Id: Id8a7d4a1e237717521bfc5a5a67f23c4ee801c61