Show if parameter change has been confirmed by ABX

Core/Inc/vehicle_state.h

@@ -5,6 +5,7 @@
 extern "C" {
 #endif
 
+#include "params.h"
 #include "stw_defines.h"
 #include <stdint.h>
 
@@ -168,6 +169,8 @@ typedef struct {
   float desired_speed;
 
   ConePosition cone_pos[NUM_CONES];
+
+  ParamType last_param_confirmed;
 } VehicleState;
 
 extern VehicleState vehicle_state;