TIMOB-15094-Added support for app 'pause' and 'resume' events

https://jira.appcelerator.org/browse/TIMOB-15094
Added support for app 'pause' and 'resume' events
Maybe you tried many times and it got called, but you cannot guarantee that. About the comparison, Android doc has had that statement "You should *NEVER* compare to exact values of the level" very clearly, so we should *never* do that.