Added SharedElementCallback to be able to detect if shared element
is still visible. If not, the shared element transition should not
be performed when returning to the previous fragment.
Added the pager tab strip to the fade animation to keep shared element
transition smooth when poster is partly below the toolbar.
* Refactored OnMovieSelectedListener interface to keep argument list small.
* Changed fragment transition animation to make shared element transition
smooth and nicely integrated with the whole scene animation.
Martijn Brekhof
Synced Synapse