[ci-scan] Skip DnsGetHost*_LocalhostSubdomain_RespectsAddressFamily on Android (refs #128253)

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Reasoning

The tests DnsGetHostEntry_LocalhostSubdomain_RespectsAddressFamily and DnsGetHostAddresses_LocalhostSubdomain_RespectsAddressFamily fail on Android because Dns.GetHostEntry/GetHostAddresses returns IPv6 addresses when only IPv4 (InterNetwork) is requested. The Android resolver does not filter by address family for localhost subdomains. The [ActiveIssue] attribute is the narrowest correct fix — Android-only, matching the observed failure scope.

Linked KBE: #128253

Match verification (from Step 4.8):

1. Same test/family: yes — GetHostEntryTest.DnsGetHostEntry_LocalhostSubdomain_RespectsAddressFamily and sibling GetHostAddresses variant
2. Same failure signature: yes — Assert.All() Failure with Expected: InterNetwork, Actual: InterNetworkV6
3. Same OS: yes — Android
4. Same architecture: yes — arm64

Impact on platforms

• runtime-extra-platforms / android-arm64 Release AllSubsets_Mono / Windows.11.Amd64.Android.Open — exit code 1
• runtime-extra-platforms / android-arm64 Release AllSubsets_CoreCLR / Windows.11.Amd64.Android.Open — exit code 1

Errors log

[FAIL] System.Net.NameResolution.Tests.GetHostEntryTest.DnsGetHostEntry_LocalhostSubdomain_RespectsAddressFamily(addressFamily: InterNetwork)
Assert.All() Failure: 5 out of 7 items in the collection did not pass.
[1]: Item:  fe80::244c:96ff:fe41:5910%47
     Error: Assert.Equal() Failure: Values differ
            Expected: InterNetwork
            Actual:   InterNetworkV6

[FAIL] System.Net.NameResolution.Tests.GetHostAddressesTest.DnsGetHostAddresses_LocalhostSubdomain_RespectsAddressFamily(addressFamily: InterNetwork)
Assert.All() Failure: 5 out of 7 items in the collection did not pass.

First build it occurred

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1420047
• Finished: 2026-05-14
• Occurrences in window: 8+ (persistent across the entire scanned window)
• Computed within the scanned window; may not be the true origin.

Linked issue

#128253

Note

🔒 Integrity filter blocked 1 item

The following item was blocked because it doesn't meet the GitHub integrity level.

• #125825 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by CI Outer-Loop Failure Scanner · ● 30M · ◷

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