Add some pages to search index.

* Notification access page
* VR Listener page
* Feature flags in dev options
* QS Tile developer options
* User dictionary
* Billing cycle
* Some accessibilty pages

Bug: 70720645
Test: robotests
Change-Id: I4f7d3d65b2803cebf178ac345a79721232df707c
diff --git a/res/xml/language_and_input.xml b/res/xml/language_and_input.xml
index 747d1b4..ec15f0d 100644
--- a/res/xml/language_and_input.xml
+++ b/res/xml/language_and_input.xml
@@ -63,7 +63,9 @@
         <!-- User dictionary preference title and fragment will be set programmatically. -->
         <Preference
             android:key="key_user_dictionary_settings"
-            android:title="@string/user_dict_settings_title" />
+            android:title="@string/user_dict_settings_title"
+            android:fragment="com.android.settings.inputmethod.UserDictionaryList"
+            settings:controller="com.android.settings.language.UserDictionaryPreferenceController" />
     </PreferenceCategory>
 
     <PreferenceCategory