[Android] Fix crash starting the swipe on SwipeView inside CollectionView

[jsuarezruiz]

Description of Change

Fix crash starting the swipe on SwipeView inside CollectionView.

I have not been able to reproduce the crash on emulators or device (Pixel 8 Android 15) so I have applied changes based on reviewing the log attached to the issue.

Draft PR until we can reproduce it.

Issues Fixed

Fixes #26328

[sheiksyedm]

@jsuarezruiz Since the crash is reproducing randomly on the Android platform in a Windows machine, we are unable to test the fix precisely. However, after applying the fix, the issue did not reproduce in multiple attempts. Additionally, we ensured that without the fix, the issue was reproduced in random scenarios. So, hope this PR will resolve the issue

[jsuarezruiz]

/rebase

[Copilot]

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

Files not reviewed (1)

• src/Controls/tests/TestCases.HostApp/Issues/Issue26328.xaml: Language not supported

Comments suppressed due to low confidence (3)

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue26328.cs:17

• The test case should verify that the swipe items are correctly removed and that the crash is fixed.

[Category(UITestCategories.SwipeView)]

src/Core/src/Platform/Android/MauiSwipeView.cs:529

• Ensure that the behavior introduced by the null check for _contentView.IsDisposed() is covered by tests.

if (_contentView == null || _contentView.IsDisposed() || _actionView != null)

src/Core/src/Platform/Android/MauiSwipeView.cs:548

• Ensure that the behavior introduced by the null check for swipeItem is covered by tests.

AView? swipeItem = item?.ToPlatform(MauiContext);