Remove Poptart Listener From Android Portion of Wrapper

Since we removed it from our Android SDK, our Wrapper was failing trying to look for it. This is fixed. 

Bad news: a bug in the way Unity handles touch events causes us to not save a moment properly within the test app: http://forum.unity3d.com/threads/185652-UnityPlayerNativeActivity-Failed-to-receive-dispatch-signal

No known fix yet. Still working on it.