Merge "[Thread] add service unit test skeleton" into main am: 3deb5da6db

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2888486

Change-Id: I5a94f2916b9b77fd0ad6e00ee6b8329aa9b4c9c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>