Merge "Make RtNetlinkLinkMessage class immutable after creation" into main am: e7f5ac9d2f am: a026300062

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3266574

Change-Id: Id82ec91c4846094d6cae6c50629dfccd52535f21
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>