H @George_Soloupis,
If you don’t mind, I have created a tarball with a subset of the project (sorry I had to cleanup some sensitive information) and put it under the same Colab folder. You can find test_app.tgz under Colab Notebooks - Google Drive 3. Once you untar it, you should be able to load it into the Android Studio. Once run, you will have to pick a file (any file is fine since I removed the relevant logic) from the device using the BROWSE button and then click RUN INFERENCE button to trigger the runInference function in MainActivity.java.  Let me know if you are trouble access the tarball. I think I made it public but I may need your email to add you to the access list.
Thank you very much for looking into this.
George