Merge "unit test of offernetwork and unoffernetwork" am: c6c4dc719f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2171111

Change-Id: Ia8fefec6ca75f5d02a7860e78897a4553869508e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>