Speech commands Android integration

Hi,

how can I integrate model from this tutorial Reconocimiento de audio simple: reconocimiento de palabras clave  |  TensorFlow Core into my Android app? What inputs should I provide and how to interpret the outputs?

Check out this reference app:

And this community app:

https://github.com/tensorflow/examples/tree/master/lite/examples/speech_commands/android - This folder throws 404 File Not Found error in the master branch. Any older versions available? Why is it not available in master branch? What is to be done by someone if someone wants to contribute?