Set Codec Information to Downmixed DTS
Set Codec Information to Downmixed DTS

Use the informative message Downmixed DTS when DTS audio is downmixed.

Signed-off-by: Athanasios Oikonomou <1f4a9383e5343aee389622c694ebea82eb541ff4@gmail.com>

athoik/gst-plugin-dtsdownmix