Per-room notification settings do not match documentation

### Steps to reproduce

On the web or desktop client - go to a room (either DM or group), go to Room Settings > Notifications.
On the Android client - go to a room (either DM or group), go to Settings > Notifcations.

### Outcome

#### What did you expect?

I expect to be able to configure an individual room to use either noisy or silent notifications, to override my global preference to use noisy or silent notifications by default. This feature is described at https://element.io/help using the following language:


#### What happened instead?

On the web client - the described options do not exist:


On the Android client - the described options do not exist either:


What I'm seeing in both of these clients is an option to override the notifications to either **on** or **off** on a per-room basis. But no option to override them to **noisy** or **silent**. Perhaps I'm misunderstanding what the documentation is saying should exist?

Happy to assist in contributing fixes for either the documentation or the code, as needed. Just want to understand the intended behavior before I start trying to change things.

### Your phone model

Google Pixel 3a

### Operating system version

Android 12

### Application version and app store

Element 1.4.36, olm 3.2.12 from F-Droid

### Homeserver

Self-hosted, Synapse 1.66.0 via matrix-docker-ansible-deploy

### Will you send logs?

No

### Are you willing to provide a PR?

Yes