Bug 1060729 - Handle default outgoing call SIM set to always ask in ICE ...

...contacts
You use this stub in every test, so you can use this pattern instead:
```js
setup(function() {
  // ...
  this.sinon.stub(MockICEContacts, 'isFromICEContact');
  // ...
});

// ...

test('...', function() {
  MockICEContacts.isFromICEContact.returns(true);
  // ...
});
```