AVRCP enabled music player application: Enable Browsing

[Istvan Posta <iposta@avmap.ro>]

Hello,

I apologize if I will sound too dumb, but I am desperate because I can't 
the solution for my problem.

I am developing a music player application which will respond to 
Play/Pause/Stop/Next/Previous media button keys if the device running 
the application is connected to a media player device, like a media 
player in the car.

Libraries I am using:
     bluez version: 5.19
     Dbus binding: GIO 2.42.1

For this I have implemented all the interfaces following the MPRIS D-Bus 
Interface Specification, and called the org.bluez.Media1.RegisterPlayer 
method.
The application is getting Play/Pause/Stop/Next/Previous key press 
events and is responding to them accordingly.

The next step is to implement the Browsing feature in the application. 
This is where I got stuck. I have implemented the 
org.mpris.MediaPlayer2.Playlists an the org.mpris.MediaPlayer2.TrackList 
interfaces, but if I press the Browse button on the media player device, 
isn't showing the dummy playlists and tracklists of the application.

I would really appreciate If somebody could help me and give me a good 
step-by-step description of what to implement, register or call in order 
to make it work.

If I wasn't detailed enough and I have to give more information, please 
tell me.

Kind regards,
Istvan Posta.