Android sample app

This is v1 of the sample app. It doesn't include push; including push would require many more steps on the end-users part and would eliminate the "works out of the box" sample we're going for.
The SDK saves permissions, so this should only happen when none are saved.  So we don't want the Buddy.init code in this class because this may not show.  I have an example of how this flow should work that I'll email you.