Remove Wallpaper duplicate from setting search

Bug: 33701673
Test: make -j40 RunSettingsRoboTests
Change-Id: I520cbc74284d92ab05b733346ee1b3115ddd8e9f
diff --git a/src/com/android/settings/LegalSettings.java b/src/com/android/settings/LegalSettings.java
index e40152a..d5b9988 100644
--- a/src/com/android/settings/LegalSettings.java
+++ b/src/com/android/settings/LegalSettings.java
@@ -40,6 +40,7 @@
     private static final String KEY_LICENSE = "license";
     private static final String KEY_COPYRIGHT = "copyright";
     private static final String KEY_WEBVIEW_LICENSE = "webview_license";
+    private static final String KEY_WALLPAPER_ATTRIBUTIONS = "wallpaper_attributions";
 
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
@@ -76,7 +77,7 @@
 
             @Override
             public List<String> getNonIndexableKeys(Context context) {
-                final List<String> keys = new ArrayList<String>();
+                final List<String> keys = super.getNonIndexableKeys(context);
                 if (!checkIntentAction(context, "android.settings.TERMS")) {
                     keys.add(KEY_TERMS);
                 }
@@ -89,6 +90,7 @@
                 if (!checkIntentAction(context, "android.settings.WEBVIEW_LICENSE")) {
                     keys.add(KEY_WEBVIEW_LICENSE);
                 }
+                keys.add(KEY_WALLPAPER_ATTRIBUTIONS);
                 return keys;
             }