Fix image wallpaper size

Fixes a bug where the image wallpaper size
would not correctly update. Suspected cause
is checking the to-be-requested size against
the current surface size instead of the
requested surface size.

Also removes an unused field.

Bug: 21148936
Change-Id: Ief4585bd5aed5922337709d7ae0ca0bf948649d0
1 file changed