add booted onroad flag (#22318)

selfdrive/common/params.cc

@@ -128,6 +128,7 @@ std::unordered_map<std::string, uint32_t> keys = {
     {"ApiCache_Owner", PERSISTENT},
     {"ApiCache_NavDestinations", PERSISTENT},
     {"AthenadPid", PERSISTENT},
+    {"BootedOnroad", CLEAR_ON_MANAGER_START | CLEAR_ON_IGNITION_OFF},
     {"CalibrationParams", PERSISTENT},
     {"CarBatteryCapacity", PERSISTENT},
     {"CarParams", CLEAR_ON_MANAGER_START | CLEAR_ON_PANDA_DISCONNECT | CLEAR_ON_IGNITION_ON},

selfdrive/thermald/thermald.py

@@ -198,8 +198,9 @@ def thermald_thread():
   # TODO: use PI controller for UNO
   controller = PIController(k_p=0, k_i=2e-3, neg_limit=-80, pos_limit=0, rate=(1 / DT_TRML))
 
+  # Leave flag for loggerd to indicate device was left onroad
   if params.get_bool("IsOnroad"):
-    cloudlog.event("onroad flag not cleared")
+    params.put_bool("BootedOnroad", True)
 
   # CPR3 logging
   if EON: