[automerger skipped] cleanup - ipv6_host_id and is_dynamic_iid am: 2f45839780 -s ours

am skip reason: Change-Id Ie3ed4583a95f15165a05412a556bae99dc07706b with SHA-1 6b759e57d9 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/android-clat/+/11735696

Change-Id: I3e25973355550b7d4d6921641478a3a89aedbd6c