[ci-scan] Skip DNS LocalhostSubdomain_RespectsAddressFamily tests on Android (refs #128371)

[github-actions]

Reasoning

The tests DnsGetHostEntry_LocalhostSubdomain_RespectsAddressFamily and DnsGetHostAddresses_LocalhostSubdomain_RespectsAddressFamily consistently fail on Android with Assert.All() Failure — the Android resolver returns IPv6 addresses when AddressFamily.InterNetwork was requested. The [ActiveIssue] attribute scoped to TestPlatforms.Android is the correct mechanism to skip these tests while the platform-specific behavior is investigated.

Linked KBE: dotnet#128371
Tracking: dotnet#124751

Match verification (from Step 4.8):

1. Same test/family: yes — both DnsGetHostEntry_LocalhostSubdomain_RespectsAddressFamily and DnsGetHostAddresses_LocalhostSubdomain_RespectsAddressFamily
2. Same failure signature: yes — Assert.All() Failure with Expected: InterNetwork / Actual: InterNetworkV6
3. Same OS: yes — Android
4. Same architecture: yes — arm64 (KBE covers android-arm64 AllSubsets_CoreCLR)

Impact on platforms

• runtime-extra-platforms (def 154) / android-arm64 Release NativeAOT @ windows.11.amd64.android.open, exit code 1
• runtime-extra-platforms (def 154) / 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: 10 out of 12 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

First build it occurred

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1424079
• Finished: 2026-05-18
• Occurrences in window: 17+ (per KBE tracking)
• Persistent across the entire scanned window.

Linked issue

dotnet#128371

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 · ● 32.2M · ◷