Update wallpaper icon for SUW Anything else screen

A dot icon is displaying for "Change wallpaper" option on SUW Anything
else screen, the cause is that we updated new colorful icons for
homepage suggestions. So we changed the drawable back and deleted the
unused icon.

Bug: 125426694
Test: visual
Change-Id: I8cf6d6dda311a45362a47ea31dc352ba4d452f80