Merge "Add NeighborAdvertisement class to build/prase NA packet." am: d5a8a30a4d

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/1535653

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8ba625be0d95f9f4eb0b448babcdb0d6c5446a09