Kiosk/Lockdown Mode & Intro

Kiosk mode & Intro changes.

- User can now decide between two default themes during the intro
- Lockdown now passes a value to ActivityCalculator.java
- A red bar replaces notification bar when in lockdown mode
- System UI hides & dims in lockdown
- Override back button to do nothing if in lockdown mode

I'll do more tomorrow. I'm currently trying to fix action bar styles depending on themes and overriding home button crashes so I commented that out for now. I suggest you don't test this out right now as I have not yet implemented a timer to set everything back to normal. (If it's even possible to get most things back to normal)