[test] added a test for NativeViews (#20)
[test] added a test for NativeViews (#20)

Related to #18

I used sample code from here: https://developer.xamarin.com/guides/xamarin-forms/platform-features/native-views/#Consuming_Native_Views
jonathanpeppers/Xamarin.Forms.Mocks,jonathanpeppers/Xamarin.Forms.Mocks