[ISSUE-4741] Implement audio playback Core & UI

[leandroBorgesFerreira]

🎯 Goal

Implement audio messages playback. This is a preview of the future that may change once the final specs are ready.

🛠 Implementation details

• Adding a new type of message.
• Adding StreamAudioPlayer that coordinates the audio play.

Note1: Customization is not implemented. Let's add this once the final version of the async audio feature is decided and all the specs are documented.

Note2: It is not possible to play a message in the MessageComposer using the file path (before sending it to the backend), only the assertUrl is available (when editing the message). I leave this to the record part of this feature.

🎨 UI Changes

New message type available

🧪 Testing

Go to the channel Junior Big and check the audio messages available there.

☑️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 - after release.
• [ ] New code is covered by unit tests
• Comparison screenshots added for visual changes
• Affected documentation updated (KDocs, docusaurus, tutorial). todo

☑️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

🎉 GIF

[kanat]

Will be a part of #4828