Make the fragment title can’t searchable

we shouldn't take users so deep into the settings IA because it's easy
to feel lost in settings after clicking on a result without additional
context.

Bug: 143055215
Test: robotest & manual
Change-Id: I337cb5ead31e1e4e7bf9be78132e90630f83ee43

src/com/android/settings/wfd/WifiDisplayPreferenceController.java

@@ -69,8 +69,7 @@ public class WifiDisplayPreferenceController extends BasePreferenceController im
 
     @Override
     public int getAvailabilityStatus() {
-        return WifiDisplaySettings.isAvailable(mContext) ? AVAILABLE_UNSEARCHABLE
-                : UNSUPPORTED_ON_DEVICE;
+        return WifiDisplaySettings.isAvailable(mContext) ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
 
     @Override
@@ -104,4 +103,4 @@ public class WifiDisplayPreferenceController extends BasePreferenceController im
     public void onStop() {
         mRouter.removeCallback(mRouterCallback);
     }
-}
+}