Implement toggle notification panel for new buttons in taskbar

This CL adds toggle notification panel function for new buttons in Kingyo taskbar.

Bug: 199333223
Test: m, verify that clicking the new buttons will expand/collapse quick settings and notification panel

Recall: http://recall/clips/993bc14b-98a7-4d7d-98c4-17ba271d4da9
Change-Id: Iacec5b4aa1ea6d89e084c0a7c91ee62d2bbba8ae

packages/SystemUI/shared/src/com/android/systemui/shared/recents/ISystemUiProxy.aidl

@@ -155,5 +155,10 @@ interface ISystemUiProxy {
      */
     void onImeSwitcherPressed() = 49;
 
-    // Next id = 50
+    /**
+     * Notifies to toggle notification panel.
+     */
+    void toggleNotificationPanel() = 50;
+
+    // Next id = 51
 }

packages/SystemUI/src/com/android/systemui/recents/OverviewProxyService.java

@@ -400,6 +400,13 @@ public class OverviewProxyService extends CurrentUserTracker implements
                     () -> mCommandQueue.handleSystemKey(KeyEvent.KEYCODE_SYSTEM_NAVIGATION_DOWN));
         }
 
+        @Override
+        public void toggleNotificationPanel() {
+            verifyCallerAndClearCallingIdentityPostMain("toggleNotificationPanel", () ->
+                    mStatusBarOptionalLazy.get().ifPresent(StatusBar::togglePanel));
+        }
+
+
         private boolean verifyCaller(String reason) {
             final int callerId = Binder.getCallingUserHandle().getIdentifier();
             if (callerId != mCurrentBoundedUserId) {

packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java

@@ -434,6 +434,10 @@ public class StatusBar extends CoreStartable implements
         mCommandQueueCallbacks.animateCollapsePanels(flags, force);
     }
 
+    /** */
+    public void togglePanel() {
+        mCommandQueueCallbacks.togglePanel();
+    }
     /**
      * The {@link StatusBarState} of the status bar.
      */