[ISSUE] Spotify + MPRIS not working

[harrisonthorne <harrisonthorne@users.noreply.github.com>]

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New issue by harrisonthorne on void-packages repository

https://github.com/void-linux/void-packages/issues/25587

Description:
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### System

* xuname:  
  `Void 5.8.13_1 x86_64 AuthenticAMD uptodate rrrmFFFFFFFFFFFFFFFFF`
* package:  
`spotify-1.1.26_2`

### Expected behavior

On my previous install with Arch Linux, I was able to control Spotify playback with `playerctl`. I'm using awesomewm with keybinds to control audio playback, with commands such as `playerctl play-pause`. These commands work for other MPRIS players like Firefox and MPV with the mpv-mpris plugin.

### Actual behavior

`playerctl` doesn't work with Spotify, and playback information doesn't show up in my [muse-status](https://github.com/harrisonthorne/muse-status) bar either.

### Steps to reproduce the behavior

Bonus issue: Currently it seems that spotify-1.1.26_***1*** is unable to be installed correctly/completely from the official nonfree repository:

```
~/D/void-packages $ sudo xbps-install spotify

Name    Action    Version           New version            Download size
spotify install   -                 1.1.26_1               - 

Size required on disk:          229B
Space available on disk:      6123MB

Do you want to continue? [Y/n] 

[*] Verifying package integrity
spotify-1.1.26_1: verifying RSA signature...

[*] Collecting package files
spotify-1.1.26_1: collecting files...

[*] Unpacking packages
spotify-1.1.26_1: unpacking ...

[*] Configuring unpacked packages
spotify-1.1.26_1: configuring ...
looking up repository.spotify.com
connecting to repository.spotify.com:80
connecting to 13.249.200.159
requesting http://repository.spotify.com/pool/non-free/s/spotify-client/spotify-client_1.1.26.501.gbe11e53b-15_amd64.deb
http://repository.spotify.com/pool/non-free/s/spotify-client/spotify-client_1.1.26.501.gbe11e53b-15_amd64.deb: (null)
Failed downloading spotify client
ERROR: spotify-1.1.26_1: [configure] INSTALL script failed to execute the post ACTION: Operation not permitted
Transaction failed! see above for errors.
``` 

So I am using the spotify package from my local repository.

1. Install spotify from a local void-packages repository
2. Make sure `playerctl` is installed too
3. Play a song on Spotify and try to toggle playback with `playerctl play-pause`

Here's an extra little bit of information:

```
~/D/void-packages $ dbus-send --type=method_call --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.PlayPause
Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.mpris.MediaPlayer2.spotify was not provided by any .service files
```

(Taken from [this issue on the Spotify discussion forums](https://community.spotify.com/t5/Desktop-Linux/Media-Keys-Don-t-Work/td-p/4586503/page/6))