[Testing] Fixed Test case failure in PR 31681 - [09/22/2025] Candidate

[NafeelaNazhir]

This PR addresses the UI test image failures that occurred in the inflight/candidate branch #31681 and includes updates to improve rendering and test stability across platforms.

• Added the mismatched snapshot images.

Build Link: https://dev.azure.com/xamarin/public/_build/results?buildId=150851&view=ms.vss-test-web.build-test-results-tab

Test Cases :

• ToggleHasBackButton_HidesBackArrow_Visual
• SetIconColor_Red_Purple_Default_Visual
• LinearGradientBrushShouldWork
• ContentPage_HideSoftinput_WithPaddingAndBackground
• ContentPage_HideSoftinput_WithRTLAndPadding
• ContentPage_Title_WithPaddingAndHideSoftInput
• Border_StrokeThicknessWithDashArray
• Border_StrokeShapeWithStrokeThickness_Ellipse
• Border_StrokeColorWithStrokeThickness
• Border_StrokeThicknessWithStrokeLineJoin_Bevel
• Border_StrokeColorWithStrokeShape_RoundRectangle
• Border_StrokeDashArrayWithDashOffset
• Border_StrokeDashArrayWithStrokeColor
• Border_StrokeShapeWithStrokeLineJoin_Bevel
• Border_StrokeShapeWithDashArray_Path
• Border_StrokeColorWithStrokeLineJoin_Round
• Border_StrokeColorWithPaddingAndContent_Image
• Border_StrokeColorWithDashArrayAndOffset

[dotnet-policy-service]

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