Fixed shopping cart view not updating on manual clearing

Author: ajungg

ui/src/main/java/io/snabble/sdk/ui/cart/ShoppingCartView.java

@@ -249,6 +249,8 @@ private void onCartUpdated() {
         updatePayText();
         updateEmptyState();
 
+        recyclerViewAdapter.notifyDataSetChanged();
+
         if (snackbar != null) {
             snackbar.dismiss();
         }