Revert "Update wallpaper asset for N dev preview"

This reverts commit d9f91827a9c6b0537b18d6e29873ae70b2d0bba6.

Change-Id: Id5ee2d02d1a1aa01c3188e889500def58a24d814
Signed-off-by: Jackeagle <jackeagle102@gmail.com>
Reviewed-on: http://review.blissroms.com/4061
4 files changed