[Live location sharing] - Removing BeaconInfo structure

[mnaturel]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

Updating the beacon state event content sent during a live location share. Some fields are no longer encapsulated into an extra data layer.
Fixing state event content sent when stopping a live: only the "live" field is updated.

Motivation and context

See MSC-3672

Screenshots / GIFs

Tests

Ensure to enable location sharing in Preferences and the live location feature flag in developer settings.

• Start a live location share into a room
• Check you see the start message of the live

Note: other live status are not currently handled (e.g. location data, stopped)

Tested devices

• Physical
• Emulator
• OS version(s): 11

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()

[github-actions]

Unit Test Results

114 files  ±0  114 suites  ±0   1m 23s ⏱️ -2s
202 tests ±0  202 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
678 runs  ±0  678 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit eb84475. ± Comparison against base commit 8eaa2f8.

♻️ This comment has been updated with latest results.

[ariskotsomitopoulos]

LGTM, it seems fine to me