Change default wallpaper

Thanks edisile

Signed-off-by: anerikg <anerikgames@gmail.com>

Conflicts:
	core/res/res/drawable-holodark-nodpi/default_wallpaper.jpg
	core/res/res/drawable-holodark-xhdpi/default_wallpaper.jpg
	core/res/res/drawable-holodark-xxhdpi/default_wallpaper.jpg
	core/res/res/drawable-nodpi/default_wallpaper.jpg
	core/res/res/drawable-sw600dp-holodark-nodpi/default_wallpaper.jpg
	core/res/res/drawable-sw600dp-nodpi/default_wallpaper.jpg
	core/res/res/drawable-sw720dp-holodark-nodpi/default_wallpaper.jpg
	core/res/res/drawable-sw720dp-nodpi/default_wallpaper.jpg
	core/res/res/drawable-xhdpi/default_wallpaper.jpg
	core/res/res/drawable-xxhdpi/default_wallpaper.jpg