player-mpris-tail.py does not print icon-none on startup.

The script doesn't display anything when no player is connected initially.
--icon-none will only be displayed after at least one player has connected and disconnected, as the code responsible for it is put in removePlayer().

I currently have this workaround to make it work:

--- /usr/share/polybar/scripts/player-mpris-tail.py	2022-09-16 13:04:47.000000000 +0800
+++ player-mpris-tail.py	2022-09-17 19:48:07.365836908 +0800
@@ -30,6 +30,8 @@
         self.connected = False
         self.player_states = {}
 
+        _printFlush(ICON_NONE)
+
         self.refreshPlayerList()
 
         if self._connect:

If this is the correct way, I can PR it.
If it's wrong and there's already some magical polybar way to do it, please point me to it.

Start with player-mpris-tail.py, especially the initialization path, refreshPlayerList(), and removePlayer(). Reproduce the case where no player is connected at startup and confirm that --icon-none is not printed. The workaround shows the expected behavior: print ICON_NONE during startup, then verify it still updates correctly when players connect or disconnect.