Update the docs for FLAG_PROMOTED_ONGOING.

Change-Id: Id97da71cc2687a45b657673577bc9fde102b8a85
Flag: DOCS_ONLY
Test: n/a
Bug: 337261753
diff --git a/core/java/android/app/Notification.java b/core/java/android/app/Notification.java
index 24594ab..614e2aa 100644
--- a/core/java/android/app/Notification.java
+++ b/core/java/android/app/Notification.java
@@ -774,8 +774,9 @@
 
     /**
      * Bit to be bitwise-ored into the {@link #flags} field that should be
-     * set by the system if this notification is a promoted ongoing notification, either via a
-     * user setting or allowlist.
+     * set by the system if this notification is a promoted ongoing notification, both because it
+     * {@link #hasPromotableCharacteristics()} and the user has not disabled the feature for this
+     * app.
      *
      * Applications cannot set this flag directly, but the posting app and
      * {@link android.service.notification.NotificationListenerService} can read it.