add missing properties

Author: Nazar65

dev/tests/integration/testsuite/Magento/MediaGallery/Model/SearchAssetsTest.php

@@ -26,6 +26,21 @@ class SearchAssetsTest extends TestCase
      */
     private $searchAssets;
 
+    /**
+     * @var SearchCriteriaBuilder
+     */
+    private $searchCriteriaBuilder;
+
+    /**
+     * @var FilterGroupBuilder
+     */
+    private $filterGroupBuilder;
+
+    /**
+     * @var FilterBuilder
+     */
+    private $filterBuilder;
+
     /**
      * @inheritdoc
      */