fix `Notification is not defined` on Android Webview or under ios16.4

Kairlec

2023-04-23 ea3f899593f47c1c6fe708495af0a091a3c73d5f

 src/main/java/com/genersoft/iot/vmp/gb28181/transmit/event/response/impl/CancelResponseProcessor.java

@@ -17,7 +17,7 @@
@Component
public class CancelResponseProcessor extends SIPResponseProcessorAbstract {

   private String method = "CANCEL";
   private final String method = "CANCEL";

   @Autowired
   private SipLayer sipLayer;