thermald: let manager handle shutdown (#23528)

* thermald: let manager handle shutdown

* add warning so its actually sent

selfdrive/thermald/thermald.py

@@ -1,7 +1,6 @@
 #!/usr/bin/env python3
 import datetime
 import os
-import time
 from pathlib import Path
 from typing import Dict, NoReturn, Optional, Tuple
 from collections import namedtuple, OrderedDict
@@ -373,10 +372,8 @@ def thermald_thread() -> NoReturn:
 
     # Check if we need to shut down
     if power_monitor.should_shutdown(peripheralState, onroad_conditions["ignition"], in_car, off_ts, started_seen):
-      cloudlog.info(f"shutting device down, offroad since {off_ts}")
+      cloudlog.warning(f"shutting device down, offroad since {off_ts}")
-      # TODO: add function for blocking cloudlog instead of sleep
+      params.put_bool("DoShutdown", True)
-      time.sleep(10)
-      HARDWARE.shutdown()
 
     msg.deviceState.chargingError = current_filter.x > 0. and msg.deviceState.batteryPercent < 90  # if current is positive, then battery is being discharged
     msg.deviceState.started = started_ts is not None