[tests] Copy installer runtime dependencies

[jonathanpeppers]

Summary

• add direct Polly and SharpZipLib package references to Xamarin.Android.Build.Tests
• make the test assembly's runtime copy-local closure independent of shared pack output ordering

Context

Azure DevOps build 1579349 failed AndroidDependenciesTests.InstallAndroidDependenciesTest("GoogleV2", CoreCLR) on Linux, macOS, and Windows because test-assemblies/net10.0 omitted ICSharpCode.SharpZipLib.dll and Polly.dll. The failure surfaced as:

System.IO.FileNotFoundException: Could not load file or assembly 'ICSharpCode.SharpZipLib, Version=1.3.3.11'

Xamarin.Installer.AndroidSDK intentionally excludes/private-assets these runtime dependencies unless its legacy PublicSharpZipLib and PublicPolly switches are set. Since #12580 made Xamarin.Android.Build.Tests consume that project directly, the test had accidentally relied on Xamarin.Installer.Build.Tasks copying both packages into a shared output directory first. Parallel project builds made that ordering nondeterministic.

Direct package references follow the existing explicit-consumer pattern in Xamarin.Installer.Build.Tasks and ensure NuGet includes both assemblies in the test project's own copy-local set. Setting AdditionalProperties on the ProjectReference would only configure the referenced project build and would leave the consuming test project's restore/copy-local intent indirect.

Validation

• restored Xamarin.Android.Build.Tests targeting .NET 10
• ran ResolvePackageAssets and confirmed both Polly.dll and ICSharpCode.SharpZipLib.dll are RuntimeCopyLocalItems with CopyLocal=true
• git diff --check

[Copilot]

🟢 Approval recommended

The change is scoped to deterministic dependency inclusion for tests and does not introduce behavioral risk to product code.

Pull request overview

This PR updates the Xamarin.Android.Build.Tests test project to make its runtime dependency closure deterministic by explicitly restoring/copying installer runtime dependencies (rather than relying on shared output ordering from parallel builds).

Changes:

• Add direct Polly package reference to the test project.
• Add direct SharpZipLib package reference to the test project.

File summaries

File	Description
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Xamarin.Android.Build.Tests.csproj	Adds explicit Polly and SharpZipLib package references to ensure the test assembly’s copy-local runtime dependencies are reliably included.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 1
• Review effort level: Lite