Revert "Update test to not trace thread start / join"

This reverts commit 04c7c63a3694074640eaad54c61a4c4bcb02cb6b.

Reason for revert: Causes breakages on luci:
https://ci.chromium.org/ui/p/art/builders/ci/host-x86_64-cms/8691/overview

Change-Id: I77b8dd52fc2402170df9a000b30311580cf918dc
2 files changed