Tear down old element before disposing the ItemViewAdapter.

Author: Kevin Petit

Xamarin.Forms.Platform.Android/CollectionView/ItemsViewRenderer.cs

@@ -135,12 +135,16 @@ protected override void Dispose(bool disposing)
 				_automationPropertiesProvider?.Dispose();
 				Tracker?.Dispose();
 
-				ItemsViewAdapter?.Dispose();
-
 				if (Element != null)
 				{
 					TearDownOldElement(Element as ItemsView);
+				}
 
+				// Dispose the adapter after tear down element
+				ItemsViewAdapter?.Dispose();
+
+				if (Element != null)
+				{
 					if (Platform.GetRenderer(Element) == this)
 					{
 						Element.ClearValue(Platform.RendererProperty);