Fix : Deck Picker Arrow doesn't rotate on expanding and collapsing the deck.

[xenonnn4w]

Purpose / Description

In the deck picker, arrow doesn't rotate on expanding or collapsing the deck.

Fixes

• Fixes In deck picker, arrow doesn't rotate on expanding deck #17915

Approach

deckExpander (the dropdown arrow) visibility and click behavior depend on node.children.isNotEmpty(). When the user toggles the expansion state (by clicking deckExpander), the dataset changes, but without notifyItemChanged(position), the UI does not get updated.

How Has This Been Tested?

API 24

android7.webm

API 34

androidapi35.webm

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[xenonnn4w]

While testing it, somehow i encountered that no deck expander is created for a deck. Maybe that due to runBlocking , but i'm unable to reproduce the same again.

[lukstbit]

Thanks!