dotcase: add the broadcast receiver

* Use an if statement eve though toast will strangle puppies
  because of it. Need java 7 for string switches and from what
  I understand, the cm build boxes are still on 6

* Only handling the screen on even for now, as a proof of concept

Change-Id: I4cc1815ca6091e842cf8a7b88687e4888e4b15b2