Fix android bug where dynamic content In StepFlowItem gets cut

[eirinsvi]

Description of Change

Fixes https://dips.ghe.com/dips/Arena.Mobile/issues/1931

Todos

• I have tested on an Android device.
• I have tested on an iOS device.
• I have supported accessibility

Buggen er bare klart reprodusert på Samsung SM (kan testes på componentSamples)

[Copilot]

Pull request overview

This PR addresses an Android-specific layout/animation issue in StepFlowItem where dynamically added body content could be clipped during the activation/expand animation. It does so by making the expand animation adapt its target height while the body is expanding, and updates the StepFlow sample to reproduce the scenario with dynamically populated content.

Changes:

• Updated StepFlowItem expand animation to animate normalized progress (0→1) and adjust the target height during expansion when content grows.
• Updated StepFlow sample to dynamically populate the final step’s content on StepActivated to reproduce the clipping scenario.
• Added a patch changelog entry for the Android StepFlow fix.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

📁 File summary (4 files changed)

File	Description
src/library/DIPS.Mobile.UI/Components/StepFlow/StepFlowItem.cs	Adjusts expand animation to re-measure/re-target height during expansion so dynamic content isn’t clipped.
src/app/Components/ComponentsSamples/StepFlow/StepFlowSamplesViewModel.cs	Adds dynamic population of step 4 content on activation to reproduce the issue in samples.
src/app/Components/ComponentsSamples/StepFlow/StepFlowSamples.xaml	Updates the sample UI to include an intermediate step and a dynamically populated final step.
CHANGELOG.md	Adds a [62.0.2] patch entry documenting the Android StepFlow fix.