Port notification drawer custom background (1/2) and various fixes by VanirAOSP

Change-Id: I3341971fc1d6ce23dc6ee7678e81c9ad4803cccc
Port notification drawer custom background (1/2) and various fixes by VanirAOSP

Change-Id: I3341971fc1d6ce23dc6ee7678e81c9ad4803cccc