webrtc audio route to raspberry pi I2S

I'm trying to divert my audio to Max98357A DAC on Raspberry Pi 3 comming from WebRTC streaming, I am able to listen on the headphone jack but the DAC is quite.

Is there any way I can route all the sound to I2S Bus using audiomanager?

I have also followed the link below

Configuring Speaker PHat with Androidthings on Raspberrypi

but dont have access to the function, because the audioTrack is inside the webrtc library.

audioTrack.setPreferredDevice(audioOutputDevice);

Regards