[Windows] Fix Narrator announcing ContentView children twice when Description is set

[praveenkumarkarunanithi]

Note

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Root Cause

WinUI TextBlock (used by Label) automatically exposes its Text to UI Automation. ContentPanel uses the default FrameworkElementAutomationPeer, which exposes both the parent’s AutomationProperties.Name and all child elements. Unlike Android (NoHideDescendants) or iOS (AccessibilityElementsHidden), Windows has no single property to hide descendants while keeping the parent accessible. As a result, both Tab navigation and Browse mode announced duplicate content.

Description of Change

Implemented a custom ContentPanelAutomationPeer that overrides three core UI Automation methods (GetAutomationControlTypeCore , GetLocalizedControlTypeCore, GetChildrenCore) to conditionally modify behavior when Description is present.

When a Description exists, the control is exposed as AutomationControlType.Text (enables browse mode navigation; alternatives like Custom announce "custom" suffix, Group causes browse mode to skip the element), the "text" announcement suffix is suppressed via empty GetLocalizedControlTypeCore() return, and child elements are hidden by returning null from GetChildrenCore() to prevent duplication. When no Description is present, default behavior is preserved with AutomationControlType.Custom and children remain accessible.
The HasDescription helper property centralizes the non-empty Description check across all three override methods, ensuring consistent conditional logic following the MAUI `AutomationPeer patterns.

Issues Fixed

Fixes #33373

Platforms Tested

• iOS
• Android
• Windows
• Mac

Screenshots

Before Fix	After Fix
WITHOUTFIX.1.mp4	WITHFIX.1.1.mp4