Add a separate DD+ Atmos and a TrueHD Atmos overlay

[TRaSH-]

I was looking at the options for overlays, and i noticed i'm missing a DD+ Atmos and a TrueHD Atmos overlay
Because the main audio makes a huge difference in my opinion, especially if you got a setup that supports it.

[FonduemangVI]

I posted in disc about this but agreed would be good to have separate overlays for these