Update MessagingVersion to 18.3.99-g08330b37ad

[emaf]

Brings fixes for building from Windows targeting a .NET version lower than the used to build (i.e., building with .NET 11 a project targeting net10.0-ios).

[rolfbjarne]

Failed tests

• Remote .NET tests/Xamarin.Tests.WindowsTest.PluralRuntimeIdentifiersWithRemoteMac(iOS,"ios-arm64"): Failed: 'dotnet build' failed with exit code 1
• Remote .NET tests/Xamarin.Tests.WindowsTest.PluralRuntimeIdentifiersWithRemoteMac(iOS,"iossimulator-arm64;iossimulator-x64"): Failed: 'dotnet build' failed with exit code 1

This looks related to the bump.

These are both tests related to using RuntimeIdentifiers (plural) vs RuntimeIdentifier in the project file.

In that case, we do an inner build for each RuntimeIdentifier (singular), before we combine the result in the outer RuntimeIdentifiers build.

The problem seems to stem from the fact that the inner builds now have their own session, and since the output path on the mac is session-specific, the outer build can't find the inner builds' output anymore.

[rolfbjarne]

@emaf doesn't look like that worked, the nested SayHello is still creating a new session. Sample binlog: https://vsdrop.corp.microsoft.com/file/v1/macios/device-tests/20260313.5/13545692/windows_integrationwindows-3/;tests/dotnet/MySimpleApp/iOS/log-build-20260316_023942.binlog

[rolfbjarne]

@emaf I'm not quite sure how it's supposed to work now, but I see this from the nested SayHello task:

MacBuildPath = /Users/builder/Library/Caches/maui/PairToMac/Builds/MySimpleApp/e9b604fb213ff227946cf959ba8aebb102a1e25a91df4239ddf94c73a259ebc8

and then a little bit later (this is from the CompileAppManifest task):

[xma][info]: Preparing directory /Users/builder/Library/Caches/maui/PairToMac/Builds/MySimpleApp/e121ffcaa0cfac6e98ec3607c2f370bee06ca37894a931426fbdb2a5c3cf5dcf/d:/AzDO/_work/25/s/macios/tests//common before uploading...

The hashes don't match.

This is from https://vsdrop.corp.microsoft.com/file/v1/macios/device-tests/20260317.46/13579732/windows_integrationwindows-1/;tests/dotnet/MySimpleApp/iOS/log-build-20260317_141113.binlog

[vs-mobiletools-engineering-service2]

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[vs-mobiletools-engineering-service2]

✅ API diff for current PR / commit

NET (empty diffs)

• iOS: vsdrops gist ( No breaking changes )
• tvOS: vsdrops gist ( No breaking changes )
• MacCatalyst: vsdrops gist ( No breaking changes )
• macOS: vsdrops gist ( No breaking changes )

✅ API diff vs stable

NET (empty diffs)

• iOS: vsdrops gist ( No breaking changes )
• tvOS: vsdrops gist ( No breaking changes )
• MacCatalyst: vsdrops gist ( No breaking changes )
• macOS: vsdrops gist ( No breaking changes )

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🚀 [CI Build #e62d6ce] Test results 🚀

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✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 6 tests passed. Html Report (VSDrops) Download
✅ linker: All 44 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 11 tests passed. [attempt 2] Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 15 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 12 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 11 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ sharpie: All 1 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

macOS tests

✅ Tests on macOS Monterey (12): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Ventura (13): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sonoma (14): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sequoia (15): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Tahoe (26): All 5 tests passed. [attempt 2] Html Report (VSDrops) Download

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