This test is conitnuely fail in cuttlefish.
Lack of ipv6 default route in cuttlefish caused the test failed.
The reason is that the result of rfc6724Sort depends on on the route in system.
It is not good to expect any route should exists, so remove it.
Bug: 133649648
Test: atest DnsUtilsTest
Change-Id: I91f89782b9b989fa1a49e666bb5ce2df3a0dbbf7
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