Have you tried to implement without Firebase and just ML kit?

[Sushant Gautam]

https://developers.google.com/ml-kit/migration/android#new
Since we are not using Firebase's cloud component it is wiser to move to the ML kit.
I don't think there is a library yet.

[Marcos Carlomagno]

Hi! thanks for the contribution, this pull request should fix it, I wil check it out and then if works fine, merge it

#21