Bug 1052136 - Clean up mozL10n API use in Communications, part 5, matching+utilities

https://bugzilla.mozilla.org/show_bug.cgi?id=1052136
A good solution to this would be to have multiple `itemWithTYPELabel` strings, where `TYPE` is the value of `fieldValue.type`.  This implies some repetition, but that's generally a good thing in the l10n land.