Enable software tone-mapping by default

Transcoding HDR video without tonemapping results
in an unacceptable viewing experience. Many users
are not even aware of the option and therefore we
should always enable the software tonemapx filter.

Signed-off-by: nyanmisaka <nst7999610810@gmail.com>

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -309,7 +309,6 @@ namespace MediaBrowser.Controller.MediaEncoding
         private bool IsSwTonemapAvailable(EncodingJobInfo state, EncodingOptions options)
         {
             if (state.VideoStream is null
-                || !options.EnableTonemapping
                 || GetVideoColorBitDepth(state) < 10
                 || !_mediaEncoder.SupportsFilter("tonemapx"))
             {