That is not vocal fry what Adon is doing, it is a proper lower extension and happens naturally when you use a medium-mass coordination on very low notes. It's more like "mixing" vocal fry with M1, but it is still not pure vocal fry and if you train it you can get really loud with it.
The original song in the movie is sung in a low-mass coordination, which makes the initial D2 sound a little windy, but therefore removes the fry joining the mix.
Really hard to tell from that sample if you are a bass or a low baritone Adon, you should try to sing it in a low-mass configuration. That's where you can really notice the note where your voice starts to get too windy or muffled.
That said, even the original singer in the movie is not a profound bass, maybe a medium bass, because he still has some wind on that D2. A profound bass would be able to hit that note without wind.
As for myself, I usually also get windy at D2 because I am not a profound bass. But I can do a D#2 and definitely an E2 with next to no wind (and no vocal fry mixing into it).