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