How to configure android phone as A2DP source via linux terminal

Basically, i want to configure paired android phone as audio source from terminal so i can play audio via mobile on Linux PC.

I have configured /etc/audio.conf file ( Enable=Source) and register Linux PC bluetooth as A2DP sink and pairing between android phone and PC is also done .

bt-device -l command also show the added bluetooth device.

But by executing command :- pacmd list-sources android phone is not shown in available sources list.

By using blueman applet we are able to set android phone as audio source and able to stream but i am not able to configure through terminal.

Kindly suggest any command from shell which can configure android phone as audio source.