Improve logging of google_assistant messages (#110637)

* Improve logging of google_assistant messages

* Add tests

* Add test

homeassistant/components/cloud/google_config.py

@@ -330,10 +330,20 @@ class CloudGoogleConfig(AbstractConfig):
         """Return if we have a Agent User Id registered."""
         return len(self.async_get_agent_users()) > 0
 
-    def get_agent_user_id(self, context: Any) -> str:
+    def get_agent_user_id_from_context(self, context: Any) -> str:
         """Get agent user ID making request."""
         return self.agent_user_id
 
+    def get_agent_user_id_from_webhook(self, webhook_id: str) -> str | None:
+        """Map webhook ID to a Google agent user ID.
+
+        Return None if no agent user id is found for the webhook_id.
+        """
+        if webhook_id != self._prefs.google_local_webhook_id:
+            return None
+
+        return self.agent_user_id
+
     def _2fa_disabled_legacy(self, entity_id: str) -> bool | None:
         """If an entity should be checked for 2FA."""
         entity_configs = self._prefs.google_entity_configs