[automerger skipped] Add artd unit tests. am: 9f4e1f04b5 am: 983dca9497 am: 9b92e69322 am: 5668c083b8 am: f15e515172 -s ours

am skip reason: Merged-In I19701d7ca83f541becdcd413e740eff93d03037d with SHA-1 ed4f3bae3d is already in history

Original change: https://android-review.googlesource.com/c/platform/art/+/2129473

Change-Id: I5636c59a108cf45af066363663abdfda3334ef08
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>