Revert "Add utilities to create IPv6 ICMP messages." am: 405c1bfca9

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1610555

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I574f421cda87c92a80852732cd04270a3f3b4d9d
tree: f767e0d4a0700280a079ee89b3d0cd9e8a0572dd
  1. staticlibs/