Always show voice broadcasts

[weeman1337]

Part of element-hq/element-web#23282

• Now behaves like live location sharing (only disable sending them, not display)
• Reduces complexity of MessageEvent

Checklist

• Tests written for new code (and old code if feasible)
• Linter and other CI checks pass
• Sign-off given on the changes (see CONTRIBUTING.md)

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This change is marked as an internal change (Task), so will not be included in the changelog.

[kerryarchibald]

LGTM

[t3chguy]

This is effectively a partial de-labsing and will need product sign-off

[giomfo]

This is effectively a partial de-labsing and will need product sign-off

@daniellekirkwood Hi, we suggest here displaying the received voice broadcast in the room timeline (and let the user listen to them) even if the voice broadcast Labs flag is disabled.
We are doing here the same as location sharing feature.
The labs flag is mainly used to prevent voice broadcast from sending which is under development.
Can you please approve this partial de-labsing?

[daniellekirkwood]

I have played with the feature in Labs on develop.element.io and agree that removing the tile and showing an empty message is less than ideal. I agree with the idea to copy location sharing and preserving the message as it was sent.

I have other reservations/defects on the feature but I will raise those in an alternative channel as they're not relevant for this question (like alignment, bubbles view, missing play buttons, and avatar sizes)

thanks!