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

In fact I found the reason and it is the many times https://github.com/mozilla-b2g//js/handled_call.js#L247 is called. If the phone number is not passed to getScenario() there are times when it is not possible to know if we are in the "SECOND_INCOMING_CALL". You can include a console.log() in that function and see the times it is called...