ScrollView's ScrollToAsync doesn't complete when called thrice with the same value

[KarthikRajaKalaimani]

Issue Details:

When calling ScrollToAsync thrice with the same Y value on a ScrollView, the scrolling operation does not complete on iOS, Windows, and Catalyst platforms. This behavior is inconsistent with Android, where the scrolling operation completes as expected.

Root Cause:

The ScrollToAsync method does not mark the task as completed because the scroll did not occur due to the target position already being the current position. As a result, the ScrollToAsync method does not return control to the calling method.

Description of Change:

To resolve the issue, i called the ScrollFinished method if the target scroll position and current scroll position is same because the ScrollFinished method will mark the task as completed.

Tested the behavior in the following platforms.

- [x] Android

- [x] Windows

- [x] iOS

- [x] Mac

Regarding Test Case :

I will enable the test case of this issue once the this PR is merged.

Reference:

N/A

Issues Fixed:

Fixes #27250

Screenshots

Before	After
Before_27250.mov	After_27250.mov

[dotnet-policy-service]

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

[KarthikRajaKalaimani]

@dotnet-policy-service agree company="Syncfusion, Inc."

[jsuarezruiz]

/azp run

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