Bug 974864: [MMS]Pick recipient(email adress) up from contacts app

https://bugzilla.mozilla.org/show_bug.cgi?id=974864
nit: indentation and how to check:
```javascript
var requestedProps = MockMozActivity.calls[0].data.contactProperties;
assert.include(requestedProps, 'tel');
assert.include(requestedProps, 'email');
```