Test needed: add a phone number to a contact from messaging-app

From a regression in a recent phone image, as reported by bfiller, we need a test to certify that a contact can be created from a messaging-app . As listed in the wiki merge proposal process for address-book-app: "Test adding a phone number to an existing contact from a messaging-app conversation."

Test Steps:

Prerequisite: There must be a message received from a number that is not already in the address book.

1. Open the messaging app
2. Select the message received from the number
3. Open the toolbar and select Add
4. Choose Add to Existing Contact from the dialog
5. Select a contact from the address book.
6. Confirm that the number is added to the contact
7. Select Save
8. Open the Contact in the address book and make sure the number was added.