Prevent NPE from changing all apps visibility in shared state.

Also setting to false in onCloseBegin since this is an earlier signal
than onClosed.

Test: Manual (regular + recreate by toggling dark theme)
Fix: 301705545
Flag: No
Change-Id: Ifb356d4f1346f7af15a375ad7b88d2d8be227328
diff --git a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsController.java b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsController.java
index 5182a32..07d86e4 100644
--- a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsController.java
@@ -158,10 +158,6 @@
         if (mAppsView != null) {
             return;
         }
-        // mControllers and getSharedState should never be null here. Do not handle null-pointer
-        // to catch invalid states.
-        mControllers.getSharedState().allAppsVisible = true;
-
         mOverlayContext = mControllers.taskbarOverlayController.requestWindow();
 
         // Initialize search session for All Apps.
@@ -178,10 +174,7 @@
         // Ensures All Apps gets touch events in case it is not the top floating view. Floating
         // views above it may not be able to intercept the touch, so All Apps should try to.
         mOverlayContext.getDragLayer().addTouchController(mSlideInView);
-        mSlideInView.addOnCloseListener(() -> {
-            mControllers.getSharedState().allAppsVisible = false;
-            cleanUpOverlay();
-        });
+        mSlideInView.addOnCloseListener(this::cleanUpOverlay);
         TaskbarAllAppsViewController viewController = new TaskbarAllAppsViewController(
                 mOverlayContext,
                 mSlideInView,
diff --git a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsViewController.java b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsViewController.java
index 6d740c0..cf5fd59 100644
--- a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsViewController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsViewController.java
@@ -18,17 +18,22 @@
 import static com.android.launcher3.taskbar.TaskbarStashController.FLAG_STASHED_IN_TASKBAR_ALL_APPS;
 import static com.android.launcher3.util.OnboardingPrefs.ALL_APPS_VISITED_COUNT;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.allapps.AllAppsTransitionListener;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.appprediction.AppsDividerView;
 import com.android.launcher3.taskbar.NavbarButtonsViewController;
 import com.android.launcher3.taskbar.TaskbarControllers;
+import com.android.launcher3.taskbar.TaskbarSharedState;
 import com.android.launcher3.taskbar.TaskbarStashController;
 import com.android.launcher3.taskbar.overlay.TaskbarOverlayContext;
 import com.android.launcher3.taskbar.overlay.TaskbarOverlayController;
 import com.android.launcher3.util.DisplayController;
 
+import java.util.Optional;
+
 /**
  * Handles the {@link TaskbarAllAppsContainerView} behavior and synchronizes its transitions with
  * taskbar stashing.
@@ -41,6 +46,7 @@
     private final TaskbarStashController mTaskbarStashController;
     private final NavbarButtonsViewController mNavbarButtonsViewController;
     private final TaskbarOverlayController mOverlayController;
+    private final @Nullable TaskbarSharedState mTaskbarSharedState;
     private final boolean mShowKeyboard;
 
     TaskbarAllAppsViewController(
@@ -56,6 +62,7 @@
         mTaskbarStashController = taskbarControllers.taskbarStashController;
         mNavbarButtonsViewController = taskbarControllers.navbarButtonsViewController;
         mOverlayController = taskbarControllers.taskbarOverlayController;
+        mTaskbarSharedState = taskbarControllers.getSharedState();
         mShowKeyboard = showKeyboard;
 
         mSlideInView.init(new TaskbarAllAppsCallbacks(searchSessionController));
@@ -87,8 +94,10 @@
             mTaskbarStashController.applyState();
         }
 
+        Optional.ofNullable(mTaskbarSharedState).ifPresent(s -> s.allAppsVisible = true);
         mNavbarButtonsViewController.setSlideInViewVisible(true);
         mSlideInView.setOnCloseBeginListener(() -> {
+            Optional.ofNullable(mTaskbarSharedState).ifPresent(s -> s.allAppsVisible = false);
             mNavbarButtonsViewController.setSlideInViewVisible(false);
             AbstractFloatingView.closeOpenContainer(
                     mContext, AbstractFloatingView.TYPE_ACTION_POPUP);