CMWallpaper: respect suggested size

See "WallpaperCropper: respect max wallpaper width"
at http://review.cyanogenmod.org/73504

Change-Id: I2987c34098b8fc0ca4556d179492edc2fd57d5b4
Merge pull request #3 from CyanogenMod/cm-11.0

CMWallpaper: respect suggested size