Call attachToGLContext/detachFromGLContext on a same SurfaceTexture instance.
That way, we don't have to re-configure MediaCodec in order to setup the new
Surface when the video size change mid-stream (and when a new OpenGL vout is
created).

This allows make to be used as always when compiling contribs

Next times, medialibrary will be reloaded

No need to expose it.