Reapply "Support toggling Taskbar All Apps with 3P Launcher." am: 036a83cd99

The revert was not supposed to be auto-merged.

This reverts commit 5a3bf93d82, reversing
changes made to 84f8002586.

Bug: 331384026
Change-Id: Ieb11a8544db90259aae856c4af805c37ce9e68cc

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

@@ -413,6 +413,13 @@ public class LauncherTaskbarUIController extends TaskbarUIController {
         return mTaskbarLauncherStateController.isInOverview();
     }
 
+    @Override
+    protected boolean canToggleHomeAllApps() {
+        return mLauncher.isResumed()
+                && !mTaskbarLauncherStateController.isInOverview()
+                && !mLauncher.areFreeformTasksVisible();
+    }
+
     @Override
     public RecentsView getRecentsView() {
         return mLauncher.getOverviewPanel();