Fixing some small issues with the overlay.

- Should be updating the app text color to match the activity text color
- Fixing issue with indicator showing when fast toggle is disabled but
  the indicator flag is enabled
- Tweaking layout so that the buttons are flush with the borders so that
  we capture the full area for press/long press

Change-Id: Ia9b081883562ef4fd1c01fd42bc786a1feeb0854