Lockdown settings in retail demo mode

When running in demo mode, additionally disable
the following settings screens:
- Date & Time
- More (network settings)

Bug: 27280140

Change-Id: I3132d0c46b24e1e9ca3842af058073eee3df0c90

src/com/android/settings/DateTimeSettings.java

@@ -28,6 +28,8 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.Bundle;
+import android.os.UserManager;
+import android.provider.SearchIndexableResource;
 import android.provider.Settings;
 import android.provider.Settings.SettingNotFoundException;
 import android.support.v14.preference.SwitchPreference;
@@ -38,17 +40,21 @@ import android.widget.DatePicker;
 import android.widget.TimePicker;
 import com.android.internal.logging.MetricsProto.MetricsEvent;
 import com.android.settings.dashboard.SummaryLoader;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settings.search.Indexable;
 import com.android.settingslib.RestrictedLockUtils;
 import com.android.settingslib.RestrictedSwitchPreference;
 import com.android.settingslib.datetime.ZoneGetter;
 
+import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Date;
+import java.util.List;
 
 import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
 
 public class DateTimeSettings extends SettingsPreferenceFragment
-        implements OnTimeSetListener, OnDateSetListener, OnPreferenceChangeListener {
+        implements OnTimeSetListener, OnDateSetListener, OnPreferenceChangeListener, Indexable {
 
     private static final String HOURS_12 = "12";
     private static final String HOURS_24 = "24";
@@ -380,4 +386,26 @@ public class DateTimeSettings extends SettingsPreferenceFragment
             return new SummaryProvider(activity, summaryLoader);
         }
     };
+
+    public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new DateTimeSearchIndexProvider();
+
+    private static class DateTimeSearchIndexProvider extends BaseSearchIndexProvider {
+
+        @Override
+        public List<SearchIndexableResource> getXmlResourcesToIndex(
+                Context context, boolean enabled) {
+            List<SearchIndexableResource> result = new ArrayList<>();
+            // Remove data/time settings from search in demo mode
+            if (UserManager.isDeviceInDemoMode(context)) {
+                return result;
+            }
+
+            SearchIndexableResource sir = new SearchIndexableResource(context);
+            sir.xmlResId = R.xml.date_time_prefs;
+            result.add(sir);
+
+            return result;
+        }
+    }
 }