feat: use setCollapsed method from backend

[criticalAY]

Purpose / Description

The undo label was not correctly updated in the menu UI as on deck expansion the backend gets to know what to undo as it was called on expansion but the UI.

Fixes

• Fixes The "undo" deck entry should be updated automatically  #18285

Approach

• We stored a reference to the Menu in currentDeckPickerMenu so we can update menu items outside onCreateOptionsMenu().
• We clear it in onDestroyView() to avoid memory leaks and stale references when the Fragment's view is destroyed.

How Has This Been Tested?

Pixel Fold API 35
Screen_recording_20250705_043559.webm

Learning (optional, can help others)

NA

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

[david-allison]

Does this duplicate:

• fix(deck-picker): 'undo' menu item not updated #18764

[criticalAY]

Yes seems like same issue, I put filter for medium priority, sorry missed it
Different bug sorry tested your PR

[david-allison]

As discussed on Discord:

• base this PR on fix(deck-picker): 'undo' menu item not updated #18764, as it should be merged without issue
• use
  

  Anki-Android/AnkiDroid/src/main/java/com/ichi2/libanki/Decks.kt

  Lines 244 to 253 in 4c82334

  	@RustCleanup("implement and make public")
  	@LibAnkiAlias("set_collapsed")
  	@Suppress("unused", "unused_parameter")
  	private fun setCollapsed(
  	deckId: DeckId,
  	collapsed: Boolean,
  	scope: SetDeckCollapsedRequest.Scope,
  	): OpChanges {
  	TODO()
  	}

  in the ViewModel
• use REVIEWER https://github.com/ankitects/anki/blob/a83a6b5928c6563d12e7b66d4f7b7b2f51b6f22b/qt/aqt/deckbrowser.py#L348-L358