[Xamarin.iOS] Fix Bug #22198

	* Apps crashes with the following message:
		 Objective-C exception thrown.  Name: NSInternalInconsistencyException Reason: Auto Layout still required after executing -layoutSubviews. EAGLView's implementation of -layoutSubviews needs to call super.

	Fix is to call base.LayoutSubviews (); on LayoutSubviews () in iPhoneOSGameView.