[Story] Set the history visibility to `invited` when creating an E2EE room

[mxandreas]

Description

Background

Currently, when a new room is created with EX, and the Private room option is selected, then:

• E2EE encryption of the room is turned on.
• History visibility (m.room.history_visibility) is set to shared (meaning that members who join are supposed to see messages that were sent before they were invited).

In practice, this combination is not supported yet - meaning that the messages before a user was invited are visible, but can not be decrypted. Thus, for sake of clarity, it is desired that when E2EE encryption is turned on, the history visibility defaults to invited instead of shared.

As a user creating a new E2EE room, I want the history visibility of such room to be defaulted to invited So that the members who join the room would not be confused why they can't read the content of the past messages.

Acceptance criteria

• When a new room with E2EE is created, its history visibility defaults to invited.

Leads

• Tech:
• Design:

Size estimate

None

Dependencies

• None

Out of scope

• Nothing

Open questions

### Questions

Subtasks

### Android

### iOS

### Rust

### Other

Sign-off

Android

• [ ] Design sign-off on completion
• [ ] QA sign-off on completion
• [ ] Product sign-off on completion

iOS

• [ ] Design sign-off on completion
• [ ] QA sign-off on completion
• [ ] Product sign-off on completion

[mxandreas]

Leaving a note that it makes sense to tackle this as part of the Knocking project, as we touch this part of the app there anyway.