Move DnsPacket to libs/net am: 2950a64eec am: 0232fc94b4

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

Change-Id: I3da35e36b7003d18300f9583a24196deb558b3a8
tree: 87373214cc06f2e98b7dfab9eea5a8e7ba9aee4c
  1. staticlibs/