[i225] fix message list scrolling on a new message

[kanat]

🎯 Goal

Closes:

• https://github.com/GetStream/android-internal-board/issues/225

🛠 Implementation details

It looks like Compose is not dealing well with a state which contains the object properties.
From the logs perspective I saw the MessageListController emits all the changes, however, Compose was taking just the last emission as recomposition trigger.

On top of that, using data class with ts will help us to avoid cases where we keep using NewMessageState.Other object for diff messages. Currently all of such changes are ignored.

☑️Contributor Checklist

General

• I have signed the Stream CLA (required)
• Assigned a person / code owner group (required)
• Thread with the PR link started in a respective Slack channel (#android-chat-core or #android-chat-ui) (required)
• PR targets the develop branch
• PR is linked to the GitHub issue it resolves

Code & documentation

• Changelog is updated with client-facing changes
• New code is covered by unit tests
• Comparison screenshots added for visual changes
• Affected documentation updated (KDocs, docusaurus, tutorial)

☑️Reviewer Checklist

• UI Components sample runs & works
• Compose sample runs & works
• UI Changes correct (before & after images)
• Bugs validated (bugfixes)
• New feature tested and works
• Release notes and docs clearly describe changes
• All code we touched has new or updated KDocs

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