Add documentation for Android clipboard notifications on Android 13+

[Copilot]

This PR adds documentation about the automatic clipboard notifications (toasts) introduced in Android 13 and provides guidance for developers on how to handle this platform-specific behavior.

Changes Made

Starting with Android 13 (API level 33), the system automatically displays a toast notification whenever an app copies text to the clipboard. This behavior was not documented in the existing clipboard documentation, leaving developers unaware of this platform-specific change.

Documentation Updates

• Added "Platform-specific behaviors" section to clipboard.md explaining the Android 13+ automatic toast behavior
• Provided code example showing how to conditionally display custom toast notifications on Android 12 and lower for consistent user experience
• Included important warning about avoiding duplicate notifications on Android 13+

Code Example

The new documentation includes a practical code snippet that demonstrates:

private async void SetClipboardWithToastButton_Clicked(object sender, EventArgs e) { await Clipboard.Default.SetTextAsync("TestValue"); #if ANDROID // Show toast notification only on Android 12 and lower // Android 13+ automatically shows system notifications if (Android.OS.Build.VERSION.SdkInt < Android.OS.BuildVersionCodes.Tiramisu) { Android.Widget.Toast.MakeText( Microsoft.Maui.ApplicationModel.Platform.CurrentActivity ?? Android.App.Application.Context, "Copied to clipboard", Android.Widget.ToastLength.Short)?.Show(); } #endif }

Benefits

• Clarifies platform behavior: Developers now understand when automatic notifications occur
• Provides best practices: Shows how to create consistent UX across Android versions
• Prevents duplicate notifications: Warns against showing custom toasts on Android 13+
• Follows existing patterns: Uses the same documentation style as other platform-specific behaviors in the repository

Fixes #3021.

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Internal previews

📄 File	🔗 Preview link
docs/platform-integration/data/clipboard.md	docs/platform-integration/data/clipboard

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Learn Build status updates of commit d3656af:

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Learn Build status updates of commit e48ef67:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/platform-integration/data/clipboard.md	✅Succeeded	View (>=net-maui-8.0)
docs/platform-integration/snippets/shared_1/DataPage.xaml.cs	✅Succeeded	View (>=net-maui-8.0)

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[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 issues. Other issues are also a high priority. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
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[learn-build-service-prod]

Learn Build status updates of commit c864c72:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/platform-integration/data/clipboard.md	✅Succeeded	View (>=net-maui-8.0)
docs/platform-integration/snippets/shared_1/DataPage.xaml.cs	✅Succeeded	View (>=net-maui-8.0)

For more details, please refer to the build report.