Add test for WEEK_OF_MONTH

The behavior is as expected but the change wasn't picked up
between M and N so we obviously need some more tests.

Add junit4-target to targets that use core-junit and
junit4-target-hostdex to those that use core-junit-hostdex to
allow access to JUnit4 classes.

Bug: 28009087
Change-Id: Ice49b83c8e626dd3cd4054ae0c4eaf17f82d8249
2 files changed