Emms-player-mpd: doesn't see if other clients pause the daemon

[Björn Bidar via]

Hey, I noticed that when other mpd clients pause mpd Emms doesn't notice
it which results in `emms-playing-time-display-mode`/the playing time
continue to go on even thou the player is paused.

I'm using Emms 20220924.

Br,

Björn