added car uid to route done message

proto/server_car/route_done.proto

@@ -4,6 +4,10 @@ package carkot;
 option java_package = "proto.car";
 option java_outer_classname = "RouteDone";
 
+message RouteDoneRequest {
+    int32 uid = 1;
+}
+
 message RouteDoneResponse {
     int32 code = 1;
     string errorMsg = 2;