Remove default app duplicates in search

Default Work Browser and Phone app search results look
identical to the regular defaults. Supress the results
until we differentiate work results.

"Assist and voice input" duplicate is a parent-child
duplication and is removed, as well.

Bug: 36101902
Test: make RunSettingsRoboTests
Change-Id: I3bb75c199cd76e24de42548dd166c4bccd0c7f0a

tests/robotests/src/com/android/settings/applications/AdvancedAppSettingsTest.java

@@ -26,6 +26,7 @@ import com.android.settings.applications.defaultapps.DefaultBrowserPreferenceCon
 import com.android.settings.applications.defaultapps.DefaultPhonePreferenceController;
 import com.android.settings.applications.defaultapps.DefaultSmsPreferenceController;
 import com.android.settings.dashboard.SummaryLoader;
+import com.android.settings.testutils.XmlTestUtils;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -34,11 +35,14 @@ import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 import org.robolectric.util.ReflectionHelpers;
 
+import java.util.List;
+
 import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.Matchers.anyString;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
@@ -136,4 +140,16 @@ public class AdvancedAppSettingsTest {
 
     }
 
+
+    @Test
+    public void testNonIndexableKeys_existInXmlLayout() {
+        final Context context = spy(RuntimeEnvironment.application);
+        final List<String> niks = AdvancedAppSettings.SEARCH_INDEX_DATA_PROVIDER
+                .getNonIndexableKeys(context);
+        final int xmlId = (new AdvancedAppSettings()).getPreferenceScreenResId();
+
+        final List<String> keys = XmlTestUtils.getKeysFromPreferenceXml(context, xmlId);
+
+        assertThat(keys).containsAllIn(niks);
+    }
 }