From what I saw in your notebook you have already followed the steps here 1 (check them again if you like).
Inside there after conversion to tflite file they propose " This model can be integrated into an Android or an iOS app using the NLClassifier API 1 of the TensorFlow Lite Task Library 1."
So basically from now on you can use directly the Task library for that. Follow this one 1 and tell me how it goes, as I am a little sceptical about usage of russian language.
Tag me if you have more questions
Best