Bug 1010104 - [Dialer][Call Screen] Baseline of the contact name when applying the fluid font size

In fact, the only cases where passing the phone number really matters are the invocations to adaptToSpace() inside handleCallWaiting() (see https://github.com/gtorodelvalle/gaia/blob/callscreen-bug-1010104-baseline/apps/callscreen/js/calls_handler.js#L243). I though it would be more clear to always ask for the scenario and pass it the required information. I guess you prefer to avoid passing the phone number to the getScenario() function so that's what I'll do. I'll check with you via IRC as soon as you are available ;) Thanks!