Add Glide and fix many bugs.
Switch from Glide to Picasso.
Only stay visible behind launcher when playing content.
Revert "Switch from Glide to Picasso."

This reverts commit ea518ba0c3bba65651767e5f4d6d8210486f41ea.
Switch from Glide to Picasso.

This reverts commit d0897d0eedde3b6856e44cb8f13ad1296686763c.