Make optimizations for withMediaProps components easier

[Travis Arnold]

Since we're most likely building UI controls with the withMediaProps HoC. I think having the ability to whitelist or even blacklist updates that we don't care about could be cool.

Would look something like:

export default withMediaProps(PlayPause, 'isPlaying')

This way we can optimize the component in the HoC instead of having to wire that up on every control component.