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

Kairlec

2023-04-23 ea3f899593f47c1c6fe708495af0a091a3c73d5f

 web_src/src/components/dialog/recordDownload.vue

@@ -96,7 +96,10 @@
          });
        },
        close: function (){
          this.stopDownloadRecord();
          if (this.streamInfo.progress < 1) {
            this.stopDownloadRecord();
          }

          if (this.timer !== null) {
            window.clearTimeout(this.timer);
            this.timer = null;