Merge "Run tests in a single thread, to avoid CWD changes affecting other tests." into main am: 39210df70b am: 37d479ddd6

Original change: https://android-review.googlesource.com/c/platform/development/+/2812714

Change-Id: I283d1b923f9f1f9f88d48617dfcad1f2586e8320
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>