ROMControl: Fix Notification Landscape

Set layout of image at full wallpaper dimensions
Cropping should thus mean center is still centered
For portrait (general phone) purposes but landscape
isn't ugly.  Tablets need further testing.  I've
yet to bring my Grouper/Manta up to 4.3 so I could
use the input.

Change-Id: If23603019e98f908ca05e2e8e6409f68e6507b2f