Add annotationView to mapView's didSelectAnnotation and didDeselectAnnotation protocol methods #5130

MapKit passes back the annotation view that was (de)selected in - mapView:did(De)SelectAnnotationView. To maintain backwards compatibility with annotation views not backed by an MGLAnnotationView, the Mapbox API currently (and for now must continue to) pass the annotation object itself as in: - mapView:did(De)SelectAnnotation:. However, the Mapbox API can gain the annotationView for a fully formed - mapView:did(De)SelectAnnotation:annotationView:. The annotationView parameter can be nil when it does not make sense to send in (in the context of a non-MGLAnnotationView backed annotation).

This will make it easier for application developers to interact with views that are involved with selection and deselection.