8.1 oreo – Xiaomi Redmi Note 5 can not connect to the LG FH2 speaker due to a Bluetooth profile incompatibility

I found that my LG FH2 speaker uses the A2DP profile protocol:
http://gscs-b2c.lge.com/downloadFile?fileId=gQHBfK7s0ZXFVKL7CatPeA

… while my Android phone can not connect to it because it has a different profile, AVRCP:
https://source.android.com/devices/bluetooth/services

Please note that I am not trying to turn my phone into an audio sink, only the audio gateway suits me perfectly.

How can I install, push, hack or load sideways via ADB A2DP Bluetooth profile to be able to connect my mobile to my speaker?

Edit: This is a global version of Redmi Note 5 (model M1803E7SH Latin America)