Remove deprecated [Android.Runtime.Preserve] attribute

[Copilot]

• Understand the issue: Remove all usage of deprecated [Android.Runtime.Preserve] attribute
• Identify all occurrences (found 9 uses in /source/com.google.android.gms/play-services-tasks/Additions/Task.cs)
• Remove [Android.Runtime.Preserve] attributes from the Task.cs file
• Fix build error: Re-add using Android.Runtime; namespace (needed for IJavaObject type)
• Verify no more Preserve attributes exist in the codebase
• Request code review (passed with no comments)
• Run security checks (CodeQL - no issues detected)
• Address build failure feedback
• Finalize changes

Summary

All instances of the deprecated [Android.Runtime.Preserve] attribute have been successfully removed from the codebase. The using Android.Runtime; namespace was re-added as it's required for the IJavaObject type used in generic type constraints.

Changes Made

• File Modified: source/com.google.android.gms/play-services-tasks/Additions/Task.cs
  • Removed 9 [Android.Runtime.Preserve] attributes
  • Kept using Android.Runtime; directive (required for IJavaObject type)

Validation

• ✅ Code review: No issues found
• ✅ Security scan (CodeQL): No vulnerabilities detected
• ✅ No remaining instances of deprecated attribute in codebase
• ✅ Build error fixed by restoring required namespace

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Android.Runtime.Preserve] is deprecated</issue_title>
<issue_description>### Android framework version

net9.0-android

Affected platform version

.NET 9

Description

[Android.Runtime.Preserve] has been deprecated for a while, and will do nothing in .NET 11.

Remove all usage of it.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [Android.Runtime.Preserve] is deprecated #1321

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[rmarinho]

@copilot I think you might need to keep the namespace

build is failing

D:\a\_work\1\s\source\com.google.android.gms\play-services-tasks\Additions\Task.cs(12,253): error CS0246: The type or namespace name 'IJavaObject' could not be found (are you missing a using directive or an assembly reference?) [D:\a\_work\1\s\generated\com.google.android.gms.play-services-tasks\com.google.android.gms.play-services-tasks.csproj::TargetFramework=net9.0-android35.0]
D:\a\_work\1\s\source\com.google.android.gms\play-services-tasks\Additions\Task.cs(32,240): error CS0246: The type or namespace name 'IJavaObject' could not be found (are you missing a using directive or an assembly reference?) [D:\a\_work\1\s\generated\com.google.android.gms.play-services-tasks\com.google.android.gms.play-services-tasks.csproj::TargetFramework=net9.0-android35.0]
D:\a\_work\1\s\source\com.google.android.gms\play-services-tasks\Additions\Task.cs(51,249): error CS0246: The type or namespace name 'IJavaObject' could not be found (are you missing a using directive or an assembly reference?) [D:\a\_work\1\s\generated\com.google.android.gms.play-services-tasks\com.google.android.gms.play-services-tasks.csproj::TargetFramework=net9.0-android35.0]
D:\a\_work\1\s\source\com.google.android.gms\play-services-tasks\Additions\Task.cs(12,253): error CS0246: The type or namespace name 'IJavaObject' could not be found (are you missing a using directive or an assembly reference?) [D:\a\_work\1\s\generated\com.google.android.gms.play-services-tasks\com.google.android.gms.play-services-tasks.csproj::TargetFramework=net10.0-android36.0]
D:\a\_work\1\s\source\com.google.android.gms\play-services-tasks\Additions\Task.cs(32,240): error CS0246: The type or namespace name 'IJavaObject' could not be found (are you missing a using directive or an assembly reference?) [D:\a\_work\1\s\generated\com.google.android.gms.play-services-tasks\com.google.android.gms.play-services-tasks.csproj::TargetFramework=net10.0-android36.0]
D:\a\_work\1\s\source\com.google.android.gms\play-services-tasks\Additions\Task.cs(51,249): error CS0246: The type or namespace name 'IJavaObject' could not be found (are you missing a using directive or an assembly reference?) [D:\a\_work\1\s\generated\com.google.android.gms.play-services-tasks\com.google.android.gms.play-services-tasks.csproj::TargetFramework=net10.0-android36.0]
    218 Warning(s)
    6 Error(s)

[Copilot]

@copilot I think you might need to keep the namespace

build is failing
...

You're correct! I've restored the using Android.Runtime; namespace as it's needed for the IJavaObject type used in the generic constraints. The [Android.Runtime.Preserve] attributes remain removed as intended. Fixed in ecfaf60.