Add route handler back into package.xml

Signed-off-by: Muhammad Zulfaqar Azmi <zulfaqar.azmi@tier4.jp>

Author: zulfaqar-azmi-t4

planning/planning_test_utils/package.xml

@@ -28,6 +28,7 @@
   <depend>motion_utils</depend>
   <depend>nav_msgs</depend>
   <depend>rclcpp</depend>
+  <depend>route_handler</depend>
   <depend>tf2_msgs</depend>
   <depend>tf2_ros</depend>
   <depend>tier4_api_msgs</depend>