fix(datastore) Missed a function name change during merge (#643)

Author: rjuliano

aws-datastore/src/test/java/com/amplifyframework/datastore/syncengine/OrchestratorTest.java

@@ -88,7 +88,7 @@ public void itemsPlacedInStorageArePublishedToNetwork() throws AmplifyException
             );
 
         // Arrange: storage engine is running
-        orchestrator.start(EmptyAction.instance()).blockingAwait();
+        orchestrator.start(EmptyAction.create()).blockingAwait();
 
         // Act: Put BlogOwner into storage, and wait for it to complete.
         SynchronousStorageAdapter.delegatingTo(localStorageAdapter).save(susan);