Location is required for Wifi Direct so if it is not enabled we disable the preference. Additionally, this fixes some minor update issues in Wifi Wakeup that was also affecting wifi p2p. Basically they weren't updating when location settings changed until you left the screen and came back. Now they do. Test: robotests, manual Bug: 120552223 Change-Id: Ibd386fcfbef881cae3d871152675f1cab5e4a041