Aggregate voice broadcast state events

[Florian14]

Type of change

• WIP Feature
• Bugfix
• Technical
• Other :

Content

Display a single voice broadcast state event in the timeline. Each change related to the voice broadcast state will update the tile of the first state event. The position of the tile remains the same.

Motivation and context

Continue #7127

Screenshots / GIFs

Before	After

Tests

• Enable the voice broadcast feature flag
• Start a voice broadcast in a room
• Send several messages
• Update the voice broadcast state (pause/resume/stop)
• Verify that the voice broadcast tile is correctly updated and that the position of the tile has not changed

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes has been tested on an Android device or Android emulator with API 21
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/vector-im/element-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request includes a new file under ./changelog.d. See https://github.com/vector-im/element-android/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR
• If you have modified the screen flow, or added new screens to the application, you have updated the test UiAllScreensSanityTest.allScreensTest()

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

0.0% Coverage
0.0% Duplication