Ad player UI

The Ad player now has playback controls which:

1) Allow pause/play
2) Allow fullscreen
3) Do not allow seeking (seekbar is yellow and has no thumb)
4) Does not display the video title or action buttons
I believe it's called title bar in iOS and top chrome in Android - I think the term is consistent within the project though. I can't seem to find any cases where I called it title bar in the Android project. If you spot any, please let me know.

Right now the methods are arranged alphabetically. I'll submit another pull request where I group them logically.