Made changes to WebViewActivity and RegisteredActivty to ensure that render is called in android for views that are implemented natively. Currently code was missing the registration/de-registration of pages and event triggers to indicate whether the page is on screen or off screen. This has been extracted out in a state manager and re-used across classes now.
Merge pull request #76 from priyaaank/nativeRenderAndroidPatch

Made changes to enable render for Native Android views