[Windows] WebView Navigated event is still called even after cancelling the Navigation.

[Tamilarasan-Paranthaman]

Root Cause of the issue

• On Windows platforms, the Navigated event is not being restricted like on other platforms. Since the NavigationCompleted event is still triggered from the platform's view, it is considered a failed event based on the IsSuccess boolean property, causing the Navigated event to be called with failure event details.

Description of Change

• The issue has been addressed by restricting the Navigated event using the WebNavigationResult enum. The event is now triggered only when it is not in a Cancel state. This change resolves the issue and ensures consistency with how other platforms behave.

Issues Fixed

Fixes #28303

Tested the behaviour in the following platforms

• iOS
• Android
• Windows
• Mac

Screenshot

Before Issue Fix	After Issue Fix
WebView-Navigated-Event-Before-Fix.mp4	WebView-After-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.

[jsuarezruiz]

/azp run

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[jsuarezruiz]

/rebase

[Copilot]

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[jsuarezruiz]

/azp run

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