Bug 1061438 - [Ringtones] Fix wording for managing alerts

It would be cool if you had some kind of superclass that all of your tone implementations could inherit from. That would give you nice instanceof Tone properties. But it would also give you a place to define Tone.RINGTONE and Tone.ALERTTONE symbolic constants so you didn't have to use string literals like this.

Obviously not a change I'd suggest you make now, though...