Update search keywords for some pages.

Fixes: 129016511
Test: reindex
Change-Id: I73f7094168b00ecd92958c1760fde0dbd634bef9
diff --git a/res/xml/sound_settings.xml b/res/xml/sound_settings.xml
index 57bee1f..c3161d5 100644
--- a/res/xml/sound_settings.xml
+++ b/res/xml/sound_settings.xml
@@ -124,7 +124,8 @@
         android:dialogTitle="@string/ringtone_title"
         android:summary="@string/summary_placeholder"
         android:ringtoneType="ringtone"
-        android:order="-100"/>
+        android:order="-100"
+        settings:keywords="@string/sound_settings"/>
 
     <!-- Default notification ringtone -->
     <com.android.settings.DefaultRingtonePreference
@@ -180,7 +181,8 @@
         <SwitchPreference
           android:key="vibrate_on_touch"
           android:title="@string/vibrate_on_touch_title"
-          android:summary="@string/vibrate_on_touch_summary" />
+          android:summary="@string/vibrate_on_touch_summary"
+          settings:keywords="@string/keywords_vibrate_on_touch"/>
 
         <!-- Dock speaker plays -->
         <DropDownPreference