Fix wallpapers not applying in full screen

Change-Id: I01f451d0b9a2236c2cdf0c7533e6f13ef03b7bf2
WallpaperCropper requires these permission.

Without these it just crashes lockscreen wallpaper.

Change-Id: I25c676244a919ed355e02664828ddd79dd327062
Cleanup app->{theme1,theme2...} mapping on uninstall

Change-Id: I24b43e8817db1927d5b43fcf7ad3340269d046ea