title: Show downloading file success on notification and open file using rn-fetch-blob
body: <p>I am new on react native. I am getting blob response and try to save as pdf in storage using rn-fetch-blob. Using my code file saved into file storage but unable to show downloading notification. </p>
  
  <p>Here is my code: </p>
  
  <pre><code>var date = new Date();
        var path = RNFetchBlob.fs.dirs.DownloadDir + '/Inspection_' +Math.floor(date.getTime() + date.getSeconds() / 2)+'.pdf';
        RNFetchBlob
        .config({
          // addAndroidDownloads : {
          //   useDownloadManager : true,
          //   title : 'Inspections_'+inspectionId,
          //   description : 'File successfully downloaded',
          //   // path:path,
          //   // mime : 'application/pdf',
          //   // mediaScannable : true,
          //   notification : true,
          // }
        })
        .fetch('POST', url+'customer/create-pdf?id='+inspectionId, {
        Accesstoken: 'Bearer '+this.token
      })
      .then((res) =&gt; {
        console.log(res);
        let base64Str = res.data;
        // let pdfLocation = RNFetchBlob.fs.dirs.DownloadDir + '/Inspection_' +this.state.inspectionId+'.pdf';
        RNFetchBlob.fs.writeFile(path, base64Str, 'base64');
        // RNFetchBlob.android.actionViewIntent(path, 'application/pdf')
      })
      .catch((errorMessage, statusCode) =&gt; {
        console.log(errorMessage);
        console.log(statusCode);
      })
  </code></pre>
  
  <p>How to set config to show notification.</p>