Keep notification when sending smart reply.

If an app cancels a notification while we are
sending a smart reply then don't dismiss the
notification.

Bug: 79120026
Test: atest NotificationEntryManagerTest
Test: atest SmartReplyControllerTest
Test: atest statusbar.NotificationListenerTest
Test: atest NotificationRemoteInputManagerTest

Change-Id: Ibbc0014ae0aeb12b58be13c041d720903251490f