Settings: remove lockscreen wallpaper picker from Lockscreen Interface

It should be accessed through the Themes interface.

Change-Id: Ibd893c82d4f1caf1c696474a17b5fceecc4ea1ab
Signed-off-by: Roman Birg <roman@cyngn.com>

Conflicts:
	res/xml/lockscreen_interface_settings.xml

Change-Id: Ibd893c82d4f1caf1c696474a17b5fceecc4ea1ab
Merge "Settings: remove lockscreen wallpaper picker from Lockscreen Interface" into pac-4.4