Missing silent notification option

### Steps to reproduce

I want to add a silent notification / vibration to a room.

I open the room settings >> go to Notification settings

I see 3 option
-All notification (Loud)
-Mention and keywords
-None

Silent notification is missing option.

### What happened?

### What did you expect?
I want to add a silent notification vibration to a room.

### What happened?
Silent notification is missing option.

### Your phone model

Cubot Quest

### Operating system version

Android 9

### Application version and app store

v1.3.1

### Homeserver

matrix.org

### Have you submitted a rageshake?

No