Make probesize and analyzeduration configurable and simplify circular

dependencies

Makes the probesize and analyzeduration configurable with env args.
(`JELLYFIN_FFmpeg_probesize` and `FFmpeg_analyzeduration`)

MediaBrowser.Model/MediaInfo/SubtitleTrackInfo.cs

@@ -1,12 +1,15 @@
+using System;
+using System.Collections.Generic;
+
 namespace MediaBrowser.Model.MediaInfo
 {
     public class SubtitleTrackInfo
     {
-        public SubtitleTrackEvent[] TrackEvents { get; set; }
+        public IReadOnlyList<SubtitleTrackEvent> TrackEvents { get; set; }
 
         public SubtitleTrackInfo()
         {
-            TrackEvents = new SubtitleTrackEvent[] { };
+            TrackEvents = Array.Empty<SubtitleTrackEvent>();
         }
     }
 }