Downloading a file into public folder does not show up on MTP

Using the cordova-plugin-file-transfer to download a file from external url works as aspected. But when you want to see the file on Windows by using MTP when the device is connected via USB the file does not show up. Same behaviour on android photos or gallery application when you want to download an image file. The Plugin should be broadcasting "ACTION_MEDIA_SCANNER_SCAN_FILE" on the downloaded file to see it immediately.

I will submit a PR on GitHub for a tested fix, which was inspired by a similar issue on the cordova-plugin-file (CB-7487 && CB-8663).