onDestroyView
Clears views when the library view is about to be destroyed, such as when the host activity is about to be destroyed.
After calling this, showLibraryInView must be called again when showing the library view.
Clears views when the library view is about to be destroyed, such as when the host activity is about to be destroyed.
After calling this, showLibraryInView must be called again when showing the library view.