Jitsi call in a 1–1 room with a functional member is incorrectly treated as a group call in Element Classic

### Steps to reproduce

### Summary
When initiating a Jitsi call in Element Classic v1.6.48, if the room contains two users and a functional member ([Functional Members spec](https://github.com/element-hq/element-meta/blob/develop/spec/functional_members.md)), the call is recognized as a group conference.
In Element Desktop, the same scenario starts a 1–1 call.

### Outcome

#### Expected Behavior

When initiating a Jitsi call in a room containing two users and a functional member, the call is established as a 1–1 call between the two users, with the functional member not affecting the call setup.

#### What happened instead?
When initiating a Jitsi call in the room containing two users and a functional member, the call does not start as a 1–1 call. Instead, it is initialized as a group conference.

Screenshot from the private room with 2 users and functional member:

### Your phone model

_No response_

### Operating system version

Android 15

### Application version and app store

1.6.48

### Homeserver

matrix.org

### Will you send logs?

No

### Are you willing to provide a PR?

No