This reverts commit c6ee809f.

- The member variable driving_mode_ of class VehicleController is accessed
  directly in two functions. However, inside SecurityDogThreadFunc() for
  each specific vehicle controller, this member variable driving_model_
  can be changed if Emergecy() is called.
- There is already a mutex guarded accessor driving_mode() which should be
  used instead.
- fixes #10818

- The member variable driving_mode_ of class VehicleController is accessed
  directly in two functions. However, inside SecurityDogThreadFunc() for
  each specific vehicle controller, this member variable driving_model_
  can be changed if Emergecy() is called.
- There is already a mutex guarded accessor driving_mode() which should be
  used instead.
- fixes #10818

2) proto_build_generator
3) py_proto -> py_proto_library using proto_build_generator

Forget to output "Protocol manager is null".

Forget to output "Protocol manager is null".

Forget to output "Protocol can sender is null".

Forget to output "Protocol can sender is null".

Forget to output "Protocol can sender is null".

Forget to output "Protocol can sender is null".

Forget to output "Protocol manager is null".

Forget to output "Protocol can sender is null".

not

Add mode.

Speed should be corrected by steer.