Fix nullability of StateWrapper

Summary:
ViewManager does a null-check already, and so inside the `updateState` method, we can safely assume this parameter is no longer nullable.

Changelog: [Internal]

Reviewed By: JoshuaGross

Differential Revision: D36545806

fbshipit-source-id: 92eefa518f11c17b91aa3da2e14066d36fa4f4c2

ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewManager.java

@@ -285,7 +285,7 @@ public abstract class ViewManager<T extends View, C extends ReactShadowNode>
    * this component type.
    */
   public @Nullable Object updateState(
-      @NonNull T view, ReactStylesDiffMap props, @Nullable StateWrapper stateWrapper) {
+      @NonNull T view, ReactStylesDiffMap props, StateWrapper stateWrapper) {
     return null;
   }