DO NOT MERGE Fix BAL via notification.publicVersion

We stripped the token that allows app to retrieve their own notification
and fire their own PI to launch activities from background. But we
forgot to strip the token from notification.publicVersion

Bug: 278558814
Test: NotificationManagerTest#testActivityStartFromRetrievedNotification_isBlocked
(cherry picked from commit cf851d81a954f0a6dd0c2fd7defa93932539e7f9)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:1896c2e7068c9ec1ab8355d863d7e8107d5d5706)
Merged-In: I8f25d7a5e47890a0496af023149717e1df482f98
Change-Id: I8f25d7a5e47890a0496af023149717e1df482f98

Author: Nan Wu

core/java/android/app/Notification.java

@@ -3413,8 +3413,11 @@ public void setLatestEventInfo(Context context,
      *
      * @hide
      */
-    public void setAllowlistToken(@Nullable IBinder token) {
-        mAllowlistToken = token;
+    public void clearAllowlistToken() {
+        mAllowlistToken = null;
+        if (publicVersion != null) {
+            publicVersion.clearAllowlistToken();
+        }
     }
 
     /**

services/core/java/com/android/server/notification/NotificationManagerService.java

@@ -4368,7 +4368,7 @@ private StatusBarNotification sanitizeSbn(String pkg, int userId,
                     // Remove background token before returning notification to untrusted app, this
                     // ensures the app isn't able to perform background operations that are
                     // associated with notification interactions.
-                    notification.setAllowlistToken(null);
+                    notification.clearAllowlistToken();
                     return new StatusBarNotification(
                             sbn.getPackageName(),
                             sbn.getOpPkg(),