Polish all apps taskbar unstash behavior for transient and persistent.

- During gestures from taskbar all apps, unstash immediately in
  transient.
- Overlay closes sooner if all apps is open (still done later for EDU).
- Taskbar stashes in overview when All Apps is opened.
- Transient app-window threshold is ignored if All Apps is opened.

Test: Manual
Fix: 262076812
Change-Id: I46b2dcdc75ee0cc15c1b47da2139ff8c20cf618a

quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java

@@ -318,7 +318,8 @@ public abstract class AbsSwipeUpHandler<T extends StatefulActivity<S>,
     private final int mTaskbarAppWindowThreshold;
     private final int mTaskbarHomeOverviewThreshold;
     private final int mTaskbarCatchUpThreshold;
-    private boolean mTaskbarAlreadyOpen;
+    private final boolean mTaskbarAlreadyOpen;
+    private final boolean mIsTaskbarAllAppsOpen;
     private final boolean mIsTransientTaskbar;
     // May be set to false when mIsTransientTaskbar is true.
     private boolean mCanSlowSwipeGoHome = true;
@@ -359,6 +360,7 @@ public abstract class AbsSwipeUpHandler<T extends StatefulActivity<S>,
                 && DisplayController.isTransientTaskbar(mActivity);
         TaskbarUIController controller = mActivityInterface.getTaskbarController();
         mTaskbarAlreadyOpen = controller != null && !controller.isTaskbarStashed();
+        mIsTaskbarAllAppsOpen = controller != null && controller.isTaskbarAllAppsOpen();
         mTaskbarAppWindowThreshold = res
                 .getDimensionPixelSize(ENABLE_TASKBAR_REVISED_THRESHOLDS.get()
                         ? R.dimen.taskbar_app_window_threshold_v2
@@ -2264,7 +2266,7 @@ public abstract class AbsSwipeUpHandler<T extends StatefulActivity<S>,
             return displacement;
         }
 
-        if (mTaskbarAlreadyOpen) {
+        if (mTaskbarAlreadyOpen || mIsTaskbarAllAppsOpen) {
             return displacement;
         }