I would say it's not at all ironic.
The only way you could call it ironic, is if it's apparent that cell phone companies are there to encourage people to text and drive.
However, this example is a cell phone company teaching their consumers how to use the product safely. It would be similar to a gun company teaching people gun safety, it's not ironic, it's appropriate.
Irony, would be a cigarette company teaching people how to eat healthily (because the cigarette company's products are inherently unhealthy) or a car company sponsoring a cycle race (because cycling is a competitor to the company's product).