Only match identical userIDs for autogroup summaries

 Autogroup summary notif. may have identical IDs, tags and package names
  when their child notif. are posted for USER_ALL and a different user.
 This can cause the wrong group to be canceled when cancelling notifications
  for the other group.

Test: atest com.android.server.notification.NotificationManagerServiceTest#testUngroupingAutoSummary_differentUsers
Bug: 232930386
Change-Id: Ia4b1bf695299ac8f698a534e1b1a32a483db968b