VLC for iOS is too eager to show TouchID prompt
Commit 46f16c67 made VLC immediately "close" the library so it doesn't leak stuff to the multitasking screen.
But it also made VLC immediately pop up a prompt for TouchID (well, when TouchID is enabled) when going from VLC to the multitasking screen. This also makes it much easier for the user to unlock VLC, but now know it (go to multitasking screen, TouchID prompt pops up, if it authenticates, VLC is unlocked in the background (I've seen it do that in iOS 10, but it seems like on iOS 11 it will change to VLC (which makes it impossible to go from VLC to the multitasking screen in one action)).
Expected result: Lock the media library, but don't pop up a dialog box for TouchID when going from VLC to the multitasking screen.