android google-cloud-platform grpc rest speech-recognition

Google Cloud Speech API: Real Time recognition via REST

I am interested in performing real time speech to text using Google cloud speech API. I saw in the documentation that is possible to do real time speech to text when it comes to gRPC API

However I can’t see anything about real time processing in REST API, that means it is not possible to do the real time speech to text in REST?

FYI I am trying to implement this to my android application.