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/search/SearchIndexableResources.java

@@ -272,7 +272,7 @@ public final class SearchIndexableResources {
         sResMap.put(DateTimeSettings.class.getName(),
                 new SearchIndexableResource(
                         Ranking.getRankForClassName(DateTimeSettings.class.getName()),
-                        R.xml.date_time_prefs,
+                        NO_DATA_RES_ID,
                         DateTimeSettings.class.getName(),
                         R.drawable.ic_settings_date_time));