It does seem like a slightly odd choice, but Debian releases are all named after toys from a Disney movie, so...

When you think about it, how many people even know what the code name for their phone is? As developers and just generally tech-savvy people, we're aware of what version we run and what it's called, but to many users, I suspect that even knowing that their Galaxy S4 is running a thing called "Android" is at the edge of their knowledge. (The cute robot in the messaging software may help clue them in--but there are no icons of jelly beans of KitKat bars to my knowledge.)