Add ability to disable automatic fullscreen mode change when exiting it by tapping on image/gif/video

[K1rakishou]

No description provided.

[K1rakishou]

Just so I don't forget - there is the runnable that is getting executed in 3 seconds after the MultiImageView is clicked which automatically turns fullscreen mode on. So the main point of this issue is to add an ability to not turn fullscreen mode on automatically, but let the user do it manually, like some other apps do.

[K1rakishou]

Fixed in 9634b79