Move DnsPacket to libs net

This class might be used by some mainline modules.

Bug: 151052811
Test: atest DnsPacketTest
Test: atest DnsResolverTest
(clean cherry-pick from internal branch)
Merged-In: I8841d91456952ded5efbf8ea221289aecc7746ad
Change-Id: I8841d91456952ded5efbf8ea221289aecc7746ad
1 file changed
tree: 87b4fc2f1cb0e4f06e793fca833c77bc9b7e91f2
  1. Tethering/