[Windows] Fix for Flyout Content Template not updating dynamically

[Tamilarasan-Paranthaman]

Root Cause of the issue

• The Flyout content did not update dynamically when the FlyoutContentTemplate was changed at runtime.

Description of Change

• To address this, I have implemented the necessary mapping for the FlyoutContentTemplate, ensuring that the Flyout content dynamically responds and updates correctly whenever the property is modified.

Issues Fixed

Fixes #26435

Tested the behaviour in the following platforms

• Android
• Windows
• iOS
• Mac

Screenshot

Before Issue Fix	After Issue Fix
Issue.mp4	Fix.mp4

[dotnet-policy-service]

Hey there @Tamilarasan-Paranthaman! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[PureWeen]

/azp run

[azure-pipelines]

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