Move DnsPacket to libs/net am: 2950a64eec

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/libs/net/+/11862584

Change-Id: Ie689d403121e8b69667b7033a59b9b61d496fa3c
tree: 87373214cc06f2e98b7dfab9eea5a8e7ba9aee4c
  1. staticlibs/