Hide emergency setting from "Search settings"

Use the same config value created in ag/16497464 and ag/16497621
to determine if emergency setting should be searchable in Settings.

Bug: 220437126
Test: Manual test on affected phone and tablet
Change-Id: I964dd9f75f6a5c3b239aabfa4dfce84cb75c8565

src/com/android/settings/emergency/EmergencyDashboardFragment.java

@@ -66,5 +66,10 @@ public class EmergencyDashboardFragment extends DashboardFragment {
     }
 
     public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider(R.xml.emergency_settings);
+            new BaseSearchIndexProvider(R.xml.emergency_settings) {
+                @Override
+                protected boolean isPageSearchEnabled(Context context) {
+                    return context.getResources().getBoolean(R.bool.config_show_emergency_settings);
+                }
+            };
 }