`EntryPointNotFoundException` in `libzipSharpNative` when multitargeting .NET 8 bindings with .NET 8 P2

[jpobst]

Context: dotnet/android-libraries#713
Context: https://discord.com/channels/732297728826277939/732297837953679412/1092671665252597800

Testing building AndroidX.sln with all the TargetFrameworks using .NET P2, like this:

<TargetFrameworks>MonoAndroid12.0;net6.0-android;net7.0-android;net8.0-android</TargetFrameworks>

causes the build to fail with:

This seems to be related to multi-targeting:

Working TF:

• MonoAndroid12.0;net6.0-android
• MonoAndroid12.0;net6.0-android;net7.0-android
• net8.0-android

Not-working TF:

• MonoAndroid12.0;net6.0-android;net7.0-android;net8.0-android
• net8.0-android;MonoAndroid12.0;net6.0-android;net7.0-android

We speculate this may be an issue where an "older" libzipSharpNative is getting loaded from an earlier pack like .NET 6 or .NET 7, and is trying to be used with the .NET 8 Xamarin.LibZipSharp.dll.

[jpobst]

This appears fixed in .NET 8 P6.

dotnet/android-libzipsharp#127