It seems all Android media players share the same video buffers, which
results in textures containing frames for the wrong media player.
When getting a new frame, we now copy it into a FBO in order to avoid
that another media player overwrites the frame being shown on screen.
Task-number: QTBUG-35868
Change-Id: I6701cf7368a3ef9e73d649c3ece1f206cafd5bb3
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
a0746fe49c