Fix connected devices settings jank issue

Completed the UI in displayPreference() to fix jank issue.

Bug: 188752628
Test: make RunSettingsRoboTests
Change-Id: Ib97b76e1b8622424ad481597f63d3540fb0bfc5b

src/com/android/settings/connecteddevice/PreviouslyConnectedDevicePreferenceController.java

@@ -103,6 +103,7 @@ public class PreviouslyConnectedDevicePreferenceController extends BasePreferenc
             final Context context = screen.getContext();
             mBluetoothDeviceUpdater.setPrefContext(context);
             mSavedDockUpdater.setPreferenceContext(context);
+            mBluetoothDeviceUpdater.forceUpdate();
         }
     }