Improve XA0141 warning

[jpobst]

.NET 9.0.100

The NuGet package information in the XA0141 warning seems helpful, but it doesn't appear to actually work.

Repro:

dotnet new android
dotnet add package Xamarin.GooglePlayServices.Vision.Face.Contour.Internal --version 116.1.0.19
dotnet build -c Release

results in:

warning XA0141: NuGet package '<unknown>' version '<unknown>' contains a shared library 'libface_detector_v2_jni.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details
warning XA0141: NuGet package '<unknown>' version '<unknown>' contains a shared library 'libface_detector_v2_jni.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details

We should:

• Either fix the NuGet information to be more accurate or remove it.
• Maybe add the arch information to the file name (arm64-v8a/libface_detector_v2_jni.so), as each package will likely contain many versions with the same file name.
• Rewrite the warning to be a little less scary, emphasizing this is a future problem, not necessarily something that needs to be fixed today. ("is not correctly aligned" sounds like the library is broken today)

An updated example:

warning XA0141: NuGet package 'Xamarin.GooglePlayServices.Vision.Face.Contour.Internal' version '116.1.0.19' contains a shared library 'arm64-v8a/libface_detector_v2_jni.so' which is not 16KB aligned. Google may require 16KB aligned libraries in the future. See https://developer.android.com/guide/practices/page-sizes for more details.