do not print names of components that return an empty string as their…

… state to avoid leaking the names of the metrics to the agent.

PiperOrigin-RevId: 588337340
Change-Id: I731a0d5e943b9428009dd15734783d87bb2decc3

concordia/agents/basic_agent.py

@@ -175,7 +175,7 @@ def state(self):
     with self._state_lock:
       return '\n'.join(
           f"{self._agent_name}'s " + (comp.name() + ':\n' + comp.state())
-          for comp in self._components.values()
+          for comp in self._components.values() if comp.state()
       )
 
   def _maybe_update(self):