fixup! feat(aria/accordion): introduce accordion harness

Author: ok7sai

src/aria/accordion/testing/index.ts

@@ -6,4 +6,4 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-export * from './accordion-harness';
+export * from './public-api';

src/aria/accordion/testing/public-api.ts

@@ -0,0 +1,9 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+export * from './accordion-harness';