Some DnsResolverTest tests are flaky because CtsNetTestCasesLatestSdk
doesn't run with the latest resolv module that has some DoH/DoT fixes.
In this change:
1. The DnsResolverTest tests that do DNS lookups (which probably use
private DNS) and check the results are marked as DnsResolverModuleTest
2. Exclude those tests from mainline-presubmit CtsNetTestCasesLatestSdk
that doesn't run with the latest resolv module.
Bug: 279846955
Test: TreeHugger
Change-Id: I86942c22195132a5c96e838619c8bcfaaedc7c99
cc5dbf951d