[ci-scan] Skip Android DualMode IPv6 socket tests (Connection refused on ::1) (#127994)

## Summary

Mute DualMode IPv6 socket tests on Android. Android emulators don't
support IPv6 loopback, causing `Connection refused` on `::1`.

Linked KBE: #127986
Tracking: #127565

## Changes

- `DualModeSocketTest.cs`: Add `[ActiveIssue("...127986",
TestPlatforms.Android)]` to `DualModeConnectToHostString`,
`DualModeConnectToDnsEndPoint`, and `DualModeConnectAsync` classes.
- `SocketAsyncEventArgsTest.cs`: Add `[ActiveIssue("...127986",
TestPlatforms.Android)]` to `Connect_Parallel_FailsOver`.

## Reasoning

1. **Same test?** Yes — DualMode IPv6 socket tests match KBE.
2. **Same failure signature?** Yes — `Connection refused [::1]`.
3. **Same OS?** Yes — Android.
4. **Same architecture?** Yes — arm64 (Android emulator).

## Failing legs

- `runtime-extra-platforms` (def 154): Android arm64 device tests
- Recurring across multiple builds on `main`

> [!NOTE]
> This PR was generated by an automated CI scan workflow using GitHub
Copilot.




> [!NOTE]
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> <summary>🔒 Integrity filter blocked 1 item</summary>
>
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>
> - [#114222](#114222)
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>
> To allow these resources, lower `min-integrity` in your GitHub
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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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Author: github-actions[bot]

src/libraries/System.Net.Sockets/tests/FunctionalTests/DualModeSocketTest.cs

@@ -330,6 +330,7 @@ public void DualModeConnect_IPAddressListToHost_Success(IPAddress[] connectTo, I
     [Trait("IPv4", "true")]
     [Trait("IPv6", "true")]
     [SkipOnPlatform(TestPlatforms.Wasi, "Wasi doesn't support DualMode")]
+    [ActiveIssue("https://github.com/dotnet/runtime/issues/127986", TestPlatforms.Android)]
     public class DualModeConnectToHostString : DualModeBase
     {
         [ConditionalTheory(typeof(DualModeConnectToHostString), nameof(LocalhostIsBothIPv4AndIPv6))]
@@ -349,6 +350,7 @@ public void DualModeConnect_LoopbackDnsToHost_Helper(IPAddress listenOn, bool du
     [Trait("IPv4", "true")]
     [Trait("IPv6", "true")]
     [SkipOnPlatform(TestPlatforms.Wasi, "Wasi doesn't support DualMode")]
+    [ActiveIssue("https://github.com/dotnet/runtime/issues/127986", TestPlatforms.Android)]
     public class DualModeConnectToDnsEndPoint : DualModeBase
     {
         [ConditionalTheory(typeof(DualModeConnectToDnsEndPoint), nameof(LocalhostIsBothIPv4AndIPv6))]
@@ -520,6 +522,7 @@ public async Task DualModeBeginConnect_DnsEndPointToHost_Helper(IPAddress listen
     [Trait("IPv4", "true")]
     [Trait("IPv6", "true")]
     [SkipOnPlatform(TestPlatforms.Wasi, "Wasi doesn't support DualMode")]
+    [ActiveIssue("https://github.com/dotnet/runtime/issues/127986", TestPlatforms.Android)]
     public class DualModeConnectAsync : DualModeBase
     {
         [Fact] // Base case

src/libraries/System.Net.Sockets/tests/FunctionalTests/SocketAsyncEventArgsTest.cs

@@ -1160,6 +1160,7 @@ public void Connect_Parallel_Fails()
         [InlineData(true)]
         [InlineData(false)]
         [ActiveIssue("https://github.com/dotnet/runtime/issues/124079", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst)]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/127986", TestPlatforms.Android)]
         public void Connect_Parallel_FailsOver(bool preferIPv6)
         {
             using PortBlocker portBlocker = new PortBlocker(() =>