Make SetDefault() public on Essentials types for third-party platform backends - #34229

🔹 [All failing tests from maui-pr]

⚠️ 2 failing tests not displayed for this pipeline due to space limitations

❌ Microsoft.Maui.IntegrationTests.AOTTemplateTest.PublishNativeAOT(id: "maui", framework: "net10.0-ios", runtimeIdentifier: "iossimulator-arm64") [Details] [5.69% failure rate]

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Failing Configuration

• Integration Tests - mac_aot_tests_1

Exception Message

System.IO.EndOfStreamException : Unable to read beyond the end of the stream.

CallStack

   at System.IO.BinaryReader.ReadInt32()
   at Microsoft.Build.Logging.StructuredLogger.BinLogReader.OpenReader(BinaryReader binaryReader) in C:\MSBuildStructuredLog\src\StructuredLogger\BinaryLogger\BinLogReader.cs:line 192
   at Microsoft.Build.Logging.StructuredLogger.BinLogReader.ReadRecordsFromDecompressedStream(Stream decompressedStream)+MoveNext() in C:\MSBuildStructuredLog\src\StructuredLogger\BinaryLogger\BinLogReader.cs:line 303
   at Microsoft.Maui.IntegrationTests.BuildWarningsUtilities.OutputBuildErrorsFromBinLog(String binLogFilePath, Int32 maxErrors, ITestOutputHelper output) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/Utilities/BuildWarningsUtilities.cs:line 46
   at Microsoft.Maui.IntegrationTests.DotnetInternal.Build(String projectFile, String config, String target, String framework, IEnumerable`1 properties, String binlogPath, Boolean msbuildWarningsAsErrors, String runtimeIdentifier, String[] warningsToIgnore, ITestOutputHelper output) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/Utilities/DotnetInternal.cs:line 87
   at Microsoft.Maui.IntegrationTests.AOTTemplateTest.PublishNativeAOT(String id, String framework, String runtimeIdentifier) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AOTTemplateTest.cs:line 51
   at InvokeStub_AOTTemplateTest.PublishNativeAOT(Object, Span`1)
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

❌ Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS_BlazorDebug [Details] [46.14% failure rate]

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Failing Configuration

• Integration Tests - mac_runios_blazor_debug_arm64_1

Exception Message

Project Testa52494d76341998458442.csproj failed to run. Check test output/attachments for errors.

CallStack

   at Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS(String id, String config, String framework, RuntimeVariant runtimeVariant, String trimMode) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AppleTemplateTests.cs:line 154
   at Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS_BlazorDebug() in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AppleTemplateTests.cs:line 83
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

❌ Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS_BlazorRelease [Details] [49.87% failure rate]

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Failing Configuration

• Integration Tests - mac_runios_blazor_release_arm64_1

Exception Message

Project Test33f994891001005739631.csproj failed to run. Check test output/attachments for errors.

CallStack

   at Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS(String id, String config, String framework, RuntimeVariant runtimeVariant, String trimMode) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AppleTemplateTests.cs:line 154
   at Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS_BlazorRelease() in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AppleTemplateTests.cs:line 86
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

❌ Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS_MauiDebug [Details] [46.44% failure rate]

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Failing Configuration

• Integration Tests - mac_runios_maui_debug_arm64_1

Exception Message

Project Test363898747421539164026.csproj failed to run. Check test output/attachments for errors.

CallStack

   at Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS(String id, String config, String framework, RuntimeVariant runtimeVariant, String trimMode) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AppleTemplateTests.cs:line 154
   at Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS_MauiDebug() in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AppleTemplateTests.cs:line 74
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)

❌ Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS_MauiNativeAOT [Details] [49.87% failure rate]

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Failing Configuration

• Integration Tests - mac_runios_nativeaot_arm64_1

Exception Message

Project Test9ebfbbc2001183209938.csproj failed to run. Check test output/attachments for errors.

CallStack

   at Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS(String id, String config, String framework, RuntimeVariant runtimeVariant, String trimMode) in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AppleTemplateTests.cs:line 154
   at Microsoft.Maui.IntegrationTests.AppleTemplateTests.RunOniOS_MauiNativeAOT() in /_/src/TestUtils/src/Microsoft.Maui.IntegrationTests/AppleTemplateTests.cs:line 105
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)