Bug 911055 - [Dialer]DuT doesn allow to dial a <<pause>>

Yeah, much better ;) As a solution to make the tests pass, I assigned a new instance of the now empty TelephonyCall function to the MockCall object. This way |instanceof TelephonyCall| is true as needed ;)

You'll be able to check it out in the new version of the PR I'll push in a sec ;) Thanks!