Added video progress bar

I left screenSize, but having orientation there was preventing the layout from redrawing on rotation.  For some reason the TextureView containing the video was fine when rotated multiple times, but the progress bar wasn't.  I used 'show layout boundaries' in the developer options on my phone to see that the layout wasn't right.  The downside to this is that is seems to be a little slower to rotate now than it was, but the layout is correct.