If you are looking to enforce stopping the service in step 1, I would script it out. Stop the service / wait (pause) for x time / check to see if service is still running as a process and if so taskkill the process.
However, I believe the checkbox 'fail job if this task fails' will perform what you want. Check the box in step 1 and if that task fails, the whole job will fail - including the file copy.