Fix unit test errors.

When this was refactored before, some of the logic was bad.

Some of the expected values were changed as well. I figured
"add to contacts" is a really bad default text, because we
don't actually support that action in call details. Also,
the strings returned by the library for describing relative
time spans changed.

Bug: 21471763
Change-Id: I0c78c89c9c2e44de198f1f9299711fc31fe81cb1