fix: Show a background image in case media doesn't load (#1622)

src/card-controller/card-element-manager.ts

@@ -63,6 +63,7 @@ export class CardElementManager {
     this._api.getMediaLoadedInfoManager().initialize();
     this._api.getMicrophoneManager().initialize();
     this._api.getKeyboardStateManager().initialize();
+    this._api.getStyleManager().initialize();
 
     // These initializers are called when the config is updated, but on initial
     // creation of the card hass is not yet available when the config is first