Add support for Fully Kiosk sound playing state (#105762)

homeassistant/components/fully_kiosk/media_player.py

@@ -12,7 +12,7 @@
     async_process_play_media_url,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.core import HomeAssistant
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
 from .const import AUDIOMANAGER_STREAM_MUSIC, DOMAIN, MEDIA_SUPPORT_FULLYKIOSK
@@ -82,3 +82,13 @@ async def async_browse_media(
             media_content_id,
             content_filter=lambda item: item.media_content_type.startswith("audio/"),
         )
+
+    @callback
+    def _handle_coordinator_update(self) -> None:
+        """Handle updated data from the coordinator."""
+        self._attr_state = (
+            MediaPlayerState.PLAYING
+            if "soundUrlPlaying" in self.coordinator.data
+            else MediaPlayerState.IDLE
+        )
+        self.async_write_ha_state()