Add new api for search pre-index

Add sendPreIndexIntent api.

Bug: 244521263
Test: manually test and review UI
Change-Id: Ibbe88eeb114b453886693ecb92ebd8ee287f9581

src/com/android/settings/search/SearchFeatureProvider.java

@@ -71,6 +71,12 @@ public interface SearchFeatureProvider {
         return context.getString(R.string.config_settingsintelligence_package_name);
     }
 
+    /**
+     * Send the pre-index intent.
+     */
+    default void sendPreIndexIntent(Context context){
+    }
+
     /**
      * Initializes the search toolbar.
      */