The file size changes when you have interruption (pause)

Hi, Thanks for The Package,

When downloading a file without any pause, the size of the file is 24.9
But when I pause with FlutterDownloader.pause, the downloaded file size is 66.5, and the file which is a video is corrupted.

It might be a bug or something.

Start by reproducing the reported video download with FlutterDownloader.pause, comparing the file size and playback with an uninterrupted download. Trace the pause and resume behavior across the Flutter plugin and mobile implementation, then confirm that resumed downloads produce an intact file with the expected size.

Written by the indexing model from the issue text.