Support all audio type in MQTT (#19768)

* Support all audio type in MQTT

* Formatting

Author: NickM-27

docs/docs/integrations/mqtt.md

@@ -279,6 +279,8 @@ The height and crop of snapshots can be configured in the config.
 
 Publishes "ON" when a type of audio is detected and "OFF" when it is not for the camera for use as a sensor in Home Assistant.
 
+`all` can be used as the audio_type for the status of all audio types.
+
 ### `frigate/<camera_name>/audio/dBFS`
 
 Publishes the dBFS value for audio detected on this camera.

frigate/camera/activity_manager.py

@@ -181,6 +181,10 @@ def update_activity(self, new_activity: dict[str, dict[str, Any]]) -> None:
             new_detections = new_activity[camera].get("detections", [])
             if self.compare_audio_activity(camera, new_detections, now):
                 logger.debug(f"Audio detections for {camera}: {new_activity}")
+                self.publish(
+                    f"{camera}/audio/all",
+                    "ON" if len(self.current_audio_detections[camera]) > 0 else "OFF",
+                )
                 self.publish(
                     "audio_detections",
                     json.dumps(self.current_audio_detections),