Pedal interceptor sng

Co-Authored-By: Eric Brown <13560103+nworb-cire@users.noreply.github.com>

selfdrive/car/gm/values.py

@@ -21,7 +21,9 @@ class CarControllerParams:
   STEER_DRIVER_ALLOWANCE = 65
   STEER_DRIVER_MULTIPLIER = 4
   STEER_DRIVER_FACTOR = 100
-  NEAR_STOP_BRAKE_PHASE = 0.5  # m/s
+  NEAR_STOP_BRAKE_PHASE = 0.25  # m/s
+  SNG_INTERCEPTOR_GAS = 18. / 255.
+  SNG_TIME = 30  # frames until the above is reached
 
   # Heartbeat for dash "Service Adaptive Cruise" and "Service Front Camera"
   ADAS_KEEPALIVE_STEP = 100