[Android] OnSizeAllocated event not fired for Android shell - fix

[kubaflo]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Description

I've made the Android implementation to mirror the behavior of the iOS version shown below for consistency across platforms.

Issues Fixed

Fixes #31020

[Copilot]

Pull Request Overview

This PR fixes an issue where the OnSizeAllocated event was not being fired for Android Shell applications. The fix ensures that layout changes in the Shell's flyout renderer properly trigger the cross-platform layout system.

• Overrides the OnLayout method in ShellFlyoutRenderer to propagate layout changes to the Shell
• Updates the public API to reflect the new method override

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
ShellFlyoutRenderer.cs	Adds OnLayout override to trigger Shell layout updates when the flyout renderer's layout changes
PublicAPI.Unshipped.txt	Documents the new public API surface for the OnLayout method override

Comments suppressed due to low confidence (1)

src/Controls/src/Core/Compatibility/Handlers/Shell/Android/ShellFlyoutRenderer.cs:315

• [nitpick] The variable name 'destination' is unclear in this context. Consider renaming it to 'layoutRect' or 'shellBounds' to better indicate it represents the layout bounds for the Shell.

			var destination = Context.ToCrossPlatformRectInReferenceFrame(left, top, right, bottom);

[dotnet-policy-service]

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

[PureWeen]

The Layout method has been deprecated on net10

Can you rebase this to NET10 and we can see what this solution would look like on NET10

[kubaflo]

Here's what I've discovered #31056

[kubaflo]

No needed