Load original drawable if cached icon throws NotFoundException

If for some reason we get a NotFoundException while trying to retrieve
a cached icon we will attempt to load the original.

Change-Id: I36a708d3e653fed12e88fe93c6d0a7f8e46726c9
WallpaperCropper: fix lockscreen wallpaper "Set wallpaper" string

The string is wrong and does not reflect the correct action the user is
about to apply.

Change-Id: I91eba87a38546563d6cf88138a0ed07219ec794f
Signed-off-by: Roman Birg <roman@cyngn.com>