The interface was moved in a2896d2b4bfc92d27bbfc05ad1c8f25f78fa2305.

IVLCVout.Callback is an interface, not a class, and AppCompatActivity
doesn't implement those methods so the override is useless here.

 - No more c++_shared
 - No libvlc.so
 - add jniloader.so

Change surface layout in native and don't implement OnNewVideoLayoutListener
(therefore, the "android-display" module won't work).

When OpenGL ES2 is used (for software decoding, or when we need to do a
transformation like 360 videos), OnNewVideoLayoutListener won't be triggered
and mVideoWidth/Height will be 0. In that case, we should change the surface
layout using the MediaPlayer API.