Hi, have you tried in setting on the android side there you can set this.
Also in Kodi in system then system again, Audio output change number of channels to 2.0, then enable passthrough and highlight what you need and enable Dolby digital transcoding.
If you go to NaviX and then look for More power, they have Jurassic World in DtsHd, sounds good. Not as good as the Blu-ray witch is 7.1, would have been better in Atmos.
Also go to Phoenix and then One242415 then scroll down to HD DTS 5.1 there some nice one here, but only standard 5.1.
There not many DtsHD sound tracks on Kodi as it take up to much space so I believe.
Enjoy