Merge "Add test construct for RtNetlinkLinkMessage" into main am: edebb957eb

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3153556

Change-Id: If7976dbb51122ce7057fed3809aa231c1675a3cb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>