Fix Dialer tests

* Empty geocode is now " " instead of "-" per UX request
* DialpadFragment now throws IllegalArgumentException instead
of Log.wtf so that it can be tested
* Added contact id column to contactsprovider query
* Modified PhoneNumberDisplayHelper to take an instance of
PhoneNumberUtilsWrapper so that it can be mocked out
Fix label-related tests that were failing due to a change in how we
treat empty labels

Bug: 9111164

Change-Id: If2244586b9d09fa2839fa0ddfc9f369f9dc66e51