core: Expose method to toggle recent apps through Binder

This is necessary in order to toggle recent apps from other
system apps using platform APIs, which we need for implementing gestures
in a modular way.

Ref:
"core: Expose method to start assistant through Binder"

Change-Id: I1664c0618251a525697e73a2de0c8247a71dd27e

Author: someone5678

core/java/com/android/internal/statusbar/IStatusBarService.aidl

@@ -249,4 +249,9 @@ interface IStatusBarService
      * Starts the default assistant app.
      */
     void startAssist(in Bundle args);
+
+    /**
+     * Toggle recent apps.
+     */
+    void toggleRecentApps();
 }

services/core/java/com/android/server/statusbar/StatusBarManagerService.java

@@ -2783,6 +2783,18 @@ public void startAssist(Bundle args) {
         }
     }
 
+    @Override
+    public void toggleRecentApps() {
+        enforceStatusBarService();
+        if (mBar != null) {
+            try {
+                mBar.toggleRecentApps();
+            } catch (RemoteException e) {
+                Slog.e(TAG, "toggleRecentApps", e);
+            }
+        }
+    }
+
     /** @hide */
     public void passThroughShellCommand(String[] args, FileDescriptor fd) {
         enforceStatusBarOrShell();