ScrollX and ScrollY values at the ScrollView.Scrolled event are not consistent in ScrollOrientation.Both mode

[SuthiYuvaraj]

Root Cause:

The issue occurs in the ScrollView when using "Both" scroll mode, where the ScrollX and ScrollY values were not consistently retained during consecutive scroll actions. This inconsistency arises because the framework's ScrollChanged event does not always propagate the correct values for both horizontal and vertical scroll axes. The ScrollView’s internal behavior was resetting the scroll positions incorrectly when switching between horizontal and vertical scrolling, especially in "Both" orientation mode.

Description of Change:

To resolve the issue, the following changes were made:

• Horizontal Scroll Position Fix: A new property, HorizontalScrollOffset, was added to directly retrieve the horizontal scroll position from the native _hScrollView instance, ensuring the correct value for ScrollX is consistently used.
• Vertical Scroll Position Fix: The vertical scroll position (ScrollY) is now retrieved directly from PlatformView.ScrollY, ensuring the correct scroll position is retained during horizontal scrolling actions.

Fix Reference:

https://github.com/xamarin/Xamarin.Forms/blob/2f8f4864a4d289dc89a6228e2ca9d6a49993e365/Xamarin.Forms.Platform.Android/Renderers/ScrollViewRenderer.cs#L315

Issue fixed:

Fixes #26747

Output Video

Before Issue Fix	After Issue Fix
withoutfix.mov	withfix.mov

[rmarinho]

/azp run

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