The tutorial shows what the developer can do to control something with a voice command. The pertinent code is
which shows how to turn a Button red or blue using a voice command of 'turn button red' and 'turn button blue'.
Nothing specific. You can make a voice-controlled car work with any Procedures you use to command a car using Buttons or Procedures using a voice phrase of your choice.
If you have a Procedure for making the car start; call a START Procedure; to make it stop, call a STOP Procedure to make it stop.
Use a command like 'car start moving' or 'car stop moving as may be appropriate. You have to write the Procedure and call Procedure START or STOP in the 'then' block.
I don't understand Adam. The example aia can be compiled to produce an apk on your phone or run using Companion with the example aia in the Parrot tutorial HOW TO: Program the native SpeechRecognizer for Continuous Dictation and to do things . To make an app to control the robot; the developer has to write the code to operate (start, stop, turn right, turn left etc.) there are examples of how to do that made by others. Here is a simple one others say works DIY smartphone robot using simple electronics (no arduino / micro controller)