This PR removes all obsolete monoandroid10 references from MSBuild files throughout the repository. These references are leftover from Xamarin.Android and are no longer needed in .NET for Android.

The changes inline conditions containing monoandroid10 as if they evaluate to false, and remove statements that would never be evaluated:

Changes Made

Java.Interop.targets

• Removed the entire BuildVersionInfo_g_cs target that only executed for monoandroid10

Mono.Android.Runtime.targets

• Simplified package version conditions to always use AndroidPackVersion instead of conditionally choosing between ProductVersion and AndroidPackVersion

Mono.Android.Runtime.csproj

• Removed obsolete build dependency condition for classic Xamarin.Android (API > 33)
• Simplified remaining conditions to only check AndroidApiLevel without the TargetFramework checks

JavaCallableWrappers.targets

• Simplified library path conditions to always use the corlib directory path instead of conditionally choosing between v1.0 facades and corlib

Xamarin.Android.NamingCustomAttributes.projitems

• Updated condition from monoandroid10 OR netstandard2.0 to just netstandard2.0

All changes maintain proper XML structure and are minimal, surgical modifications that preserve existing functionality while removing the obsolete framework references.

Fixes #10451.

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