Voice Broadcast - Show start voice broadcast errors in a dialog

[Florian14]

Type of change

• WIP Feature
• Bugfix
• Technical
• Other :

Content

Display a dialog if the user cannot start a voice broadcast (no permission, another user already recording in the room, user is already recording a voice broadcast)

Motivation and context

Continue #7127

Screenshots / GIFs

Permission	Other user is recording	User already recording

Tests

Try starting a voice broadcast in the several contexts

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()

[giomfo]

LGTM
I tested all scenario to trigger errors : OK

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

28.6% Coverage
0.0% Duplication