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

It creates a stub function for the FontSizeManager's adaptToSpace function to void making the test to fail because of this error:
TypeError: fakeView is undefined
    at _getNextFontSize (http://callscreen.gaiamobile.org:8080/shared/js/dialer/font_size_manager.js:134:5)
    at adaptToSpace (http://callscreen.gaiamobile.org:8080/shared/js/dialer/font_size_manager.js:172:1)
    at lookupContact (http://callscreen.gaiamobile.org:8080/js/calls_handler.js:269:1)
    at findByNumber (http://callscreen.gaiamobile.org:8080/shared/test/unit/mocks/dialer/mock_contacts.js:41:5)