Fix market downloads

Change-Id: I3e99fb24b74d7f59bb69c996a2cbc6dccd1f3e4d
Default to NexusWallpaper

Change-Id: I55171c72903727c18bb675ca98b65cb68f6a3542
Remove deprecated UID flags

Change-Id: Iaa779853e13eb0b476016a6e3545919c2515d34c