Hide Location Mode from search results if it's not available.

Test: make RunSettingsRoboTests ROBOTEST_FILTER=LocationModeTest all
passes.
Bug: 70283459
Change-Id: Id99d4a8f694b6f223ee8ead9701569840e333a9e

src/com/android/settings/location/LocationMode.java

@@ -94,6 +94,11 @@ public class LocationMode extends DashboardFragment {
                     return Arrays.asList(sir);
                 }
 
+                @Override
+                protected boolean isPageSearchEnabled(Context context) {
+                    return context.getResources().getBoolean(R.bool.config_location_mode_available);
+                }
+
                 @Override
                 public List<AbstractPreferenceController> getPreferenceControllers(Context
                         context) {