Remove NAPT from PacketForwarder am: 74acb88d03 am: 402bf2dd30

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2901358

Change-Id: I947862bfa0d5d376731240236523cd0ad49847e6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>