Push notification sample code

Appcelerator provided subscribed device token code with iOS 10 or later devices have some problem.

Actually, this portion of code is not working

Ti.Platform.name == "iPhone OS"

So please take a look this sample code for push notification

- https://gist.github.com/MotiurRahman/2cd4520727271bb60316d57032bf0028

Hope this helps.