Merge " Add unit tests" into tm-mainline-prod am: 8cc75b7c67

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/18973913

Change-Id: Ib8f7668cea937dcd502a573067ebf00e999d7698
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>