Add notification setting icons in the rooms list

## Description ##
- [ ] Add muted icon on each muted room in the rooms list
- [ ] Add mentions icon on each room configured in Mentions and Keyword setting in the rooms list

## Suggested Design ##
<img width="428" alt="image" src="https://github.com/vector-im/element-x-android/assets/8969772/dee7f177-7248-4bee-a3ef-fa31a524da29">
