Bug 1007709 - [Dialer][Call Screen] Create fluid size for contact name in the upper information panel

Yeah, although I see you point, there are so many scenarios and changes of status in the call screen that it would probably be more complex to set the scenario when it changes than calculating it when needed (currently only done once in handled_call.js and once in conference_group_handler.js). In fact, that was the main reason of the refactoring, to try to have all the adaptable font size logic in one place and lower its invocations to the minimum.