RESTRICT AUTOMERGE Center align the lock screen wallpaper

On smaller display of a multi display device the lock screen wallpaper
should be showing the center area of the wallpaper. Check the display id
to find out which display the lock screen wallpaper is on, the check
needs to happened when we are adjusting the bounds to get the new
display id.

Bug: 263932616
Test: set the lock screen wallpaper and observe the result
Change-Id: I32b93084a9e716a06e032f83a8cf625c25d3e5e5