Add EnableAudioVbrEncoding to TranscodingProfile

This will allow the client selectively disable VBR audio when it causes problems.

Signed-off-by: gnattu <gnattuoc@me.com>

MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs

@@ -508,6 +508,14 @@ namespace MediaBrowser.Controller.MediaEncoding
             }
         }
 
+        public bool EnableAudioVbrEncoding
+        {
+            get
+            {
+                return BaseRequest.EnableAudioVbrEncoding;
+            }
+        }
+
         public int HlsListSize => 0;
 
         public bool EnableBreakOnNonKeyFrames(string videoCodec)