fix: dataSource of CachedVideoPlayerPlus.file is not a valid file path

[wlodzix]

I found out that issue with playing local files may be related to wrong path provided to

VideoPlayerController.file(
          File(realDataSource),
          closedCaptionFile: closedCaptionFile,
          videoPlayerOptions: videoPlayerOptions,
          httpHeaders: httpHeaders,
          viewType: viewType,
        ),

Value passed here was actually URI string, which includes the file:// scheme — so it ends up being:

/file:/data/user/0/...

But File constructor expects a file system path, like:

/data/user/0/your.app/cache/....mp4

So changing the way dataSource is created for CachedVideoPlayerPlus.file constructor seems to fix the issue.

[OutdatedGuy]

LGTM!

[OutdatedGuy]

@wlodzix thanks a bunch for the PR and the detailed bug description.