Remove obsolete SetAndroidSupportedAbis usage from test code

[Copilot]

Migrate all 49 call sites of the deprecated SetAndroidSupportedAbis extension methods to SetRuntimeIdentifiers and remove the obsolete method definitions.

Changes

• Call site migration across 18 test files using pattern-appropriate replacements:
  • Single-ABI variables (DeviceAbi, abi, supportedAbi) → new[] { variable }
  • Semicolon-separated strings (supportedAbis) → variable.Split (';')
  • Already-array variables (abis, Abis) → passed directly
  • Literal params/collection expressions → new[] { ... }
• Removed both [Obsolete] SetAndroidSupportedAbis overloads from ProjectExtensions.cs

Example

// Before
proj.SetAndroidSupportedAbis ("armeabi-v7a;arm64-v8a");
proj.SetAndroidSupportedAbis (DeviceAbi);
proj.SetAndroidSupportedAbis ("armeabi-v7a", "arm64-v8a", "x86", "x86_64");

// After
proj.SetRuntimeIdentifiers (supportedAbis.Split (';'));
proj.SetRuntimeIdentifiers (new[] { DeviceAbi });
proj.SetRuntimeIdentifiers (new[] { "armeabi-v7a", "arm64-v8a", "x86", "x86_64" });

No behavioral change — SetAndroidSupportedAbis was already a trivial wrapper around SetRuntimeIdentifiers.

[Copilot]

Pull request overview

Mechanical refactor that removes the obsolete SetAndroidSupportedAbis test helper extension and migrates all call sites to the existing SetRuntimeIdentifiers API. Since SetAndroidSupportedAbis was already a thin wrapper around SetRuntimeIdentifiers, there is no behavioral change.

Changes:

• Deleted both [Obsolete] SetAndroidSupportedAbis overloads from ProjectExtensions.cs.
• Migrated 49 call sites across 18 test files, using new[] { ... } for single-ABI/params cases, .Split(';') for semicolon-delimited strings, and passing arrays directly otherwise.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Utilities/ProjectExtensions.cs	Removes obsolete params/string overloads.
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/AotTests.cs	Migrates 3 call sites.
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/BuildTest.cs	Migrates 2 call sites.
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/BuildTest2.cs	Migrates single-ABI call.
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/EnvironmentContentTests.cs	Migrates string-ABI calls via Split.
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/IncrementalBuildTest.cs	Migrates 4 call sites.
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/ManifestTest.cs	Migrates string-ABI call via Split.
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/PackagingTest.cs	Migrates 2 call sites.
src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Tasks/LinkerTests.cs	Migrates single-literal call.
tests/MSBuildDeviceIntegration/Tests/AotProfileTests.cs	Migrates DeviceAbi call.
tests/MSBuildDeviceIntegration/Tests/BundleToolTests.cs	Migrates Abis array call.
tests/MSBuildDeviceIntegration/Tests/DebuggingTest.cs	Migrates 3 call sites.
tests/MSBuildDeviceIntegration/Tests/InstallAndRunTests.cs	Migrates 13 call sites.
tests/MSBuildDeviceIntegration/Tests/InstallTests.cs	Migrates 8 call sites.
tests/MSBuildDeviceIntegration/Tests/MarshalMethodsGCHangTests.cs	Migrates DeviceAbi call.
tests/MSBuildDeviceIntegration/Tests/MonoAndroidExportTest.cs	Migrates 2 call sites.
tests/MSBuildDeviceIntegration/Tests/PerformanceTest.cs	Migrates DeviceAbi call.
tests/MSBuildDeviceIntegration/Tests/SystemApplicationTests.cs	Migrates DeviceAbi call.

[jonathanpeppers]

Test failures unrelated.