Does anyone know if there will be audio and subtitle update for Portuguese?

My reply is not an answer to your question, but I think it's possible since there is a decent group of people who managed to make English subs. Some one can just translate it into Portuguese.

A fan team could do the translation for the subtitles and the UI if needed. I can offer some help with the process, but I can't do the translation. Instructions on how the process works and tools are provided here from scummVM:
https://github.com/scummvm/scummvm/tree/master/devtools/create_bladerunner/subtitles

Audio would be a far more difficult process for a fan team to do.