Hide "Lanauage" in search to avoid dupe results.

Change-Id: I607ac2150912bfa6ca05e6f977daab7fd90a9637
Fixes: 67515153
Test: robotests

src/com/android/settings/language/LanguageAndInputSettings.java

@@ -177,7 +177,6 @@ public class LanguageAndInputSettings extends DashboardFragment {
                     // Duplicates in summary and details pages.
                     keys.add(KEY_TEXT_TO_SPEECH);
                     keys.add(KEY_PHYSICAL_KEYBOARD);
-
                     return keys;
                 }
             };

src/com/android/settings/language/PhoneLanguagePreferenceController.java

@@ -23,6 +23,8 @@ import com.android.settings.core.PreferenceControllerMixin;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settingslib.core.AbstractPreferenceController;
 
+import java.util.List;
+
 public class PhoneLanguagePreferenceController extends AbstractPreferenceController
         implements PreferenceControllerMixin {
 
@@ -47,6 +49,13 @@ public class PhoneLanguagePreferenceController extends AbstractPreferenceControl
         preference.setSummary(localeNames);
     }
 
+    @Override
+    public void updateNonIndexableKeys(List<String> keys) {
+        // No index needed, because this pref has the same name as the parent page. Indexing it will
+        // make search page look like there are duplicate result, creating confusion.
+        keys.add(getPreferenceKey());
+    }
+
     @Override
     public String getPreferenceKey() {
         return KEY_PHONE_LANGUAGE;