[Test] CTS for DNS query fail-fast feature

For Power Saver tests, verify not only the network connectivity of
restricted apps, but also error cause.

Bug: 288340533
Test: atest
CtsHostsideNetworkTests: com.android.cts.net.HostsideNetworkCallbackTests
Change-Id: I122b62891175cd4a035f3c51c5b6073b34f8fd82
2 files changed