Generic support for Android DNG images has been in the backlog since at least June 2018, and has been raised multiple times before and since then. I first raised it myself on the old forum, either in early 2016, or at the end of 2015.
Despite being ‘under development’ last March, it seems it still hasn’t made it into Version 4. Which is very disappointing.
So, I’m voting in support of your request.