GitLab

This migrates ws and related IME service tests away from the deprecated
ServiceTest framework in favor of regular unit tests using newer
Service Manager test helpers.

Since this is the final set of tests which was using ServiceTest in
services_unittests, the target is also replaced with a plain old gtest
suite and the global catalog configuration junk is removed.

Bug: 906239
Change-Id: Ic85c7be164fde2b6a9883d0af547600c71f446b5
Reviewed-on: https://chromium-review.googlesource.com/c/1352695
Commit-Queue: Ken Rockot <rockot@google.com>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612187}