Fix #1468: Retain Drag and Drop state after an incorrect answer

[Rd4dev]

Explanation

Fix #1468

This PR includes

• Utilized explorationProgressController to retrieve the 'wrongAnswerList' from ephemeralState's pendingState and use it to populate the DragDropInteractionContentViewModel list.
• When wrongAnswerList is available, corresponding content IDs and HTML values are applied. If not, the original contentIdHtmlMap and SubtitledHtml values are used as a fallback.
• The choiceItems are set up as LiveData to ensure the UI can react to changes.
• The _choiceItems are copied to _originalChoiceItems for detecting arrangement box errors during submission when the answer has not changed.
• Retains linked-merged / unlinked states based on the wrongAnswerList data

For UI-specific PRs only

Re-order Retain State

https://github.com/user-attachments/assets/38a6377b-a0f6-4415-98b5-0e0ad512167e

Group / Unlink Retain

https://github.com/user-attachments/assets/37a0a11c-866d-42e3-9d3a-76ba64d3769b

Espresso Tests

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