Disabled bubble bar for the connected display.

Fixes: 378516887
Flag: com.android.wm.shell.enable_bubble_bar
Test: Manual. Have bubble bar with some bubbles. Connect the PC monitor
to the prepared android device.Observe bubble bar only appears on the
android device screen.

Change-Id: I9188bf9f3a74c8699c213bb7fbf886b92afeb746

quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java

@@ -308,6 +308,7 @@ public class TaskbarActivityContext extends BaseTaskbarContext {
         if (BubbleBarController.isBubbleBarEnabled()
                 && deviceBubbleBarEnabled
                 && bubbleBarView != null
+                && isPrimaryDisplay
         ) {
             Optional<BubbleStashedHandleViewController> bubbleHandleController = Optional.empty();
             Optional<BubbleBarSwipeController> bubbleBarSwipeController = Optional.empty();