Add Rfc6724 style sort for DnsResolver and fix potential bug

1. pass default network explicitly to fix potential
   mis-sync network problem in DnsResolver#query
2. Add rfc6724 sort and related test
3. DnsResolver do rfc6724 sort before response InetAddress answers
4. move haveIpv* function from DnsResolver to DnsUtils

Bug: 129530368
Test: atest DnsResolverTest DnsUtilsTest
Change-Id: I4efa599c0605f6a9e4ef2dd1a36572c69b3c433f
5 files changed
tree: d2bf255a3c74604503318ec90a7aed3c09f0ef78
  1. core/
  2. services/
  3. tests/