Notifications for invisible events (room permission changes)

### Steps to reproduce

1. Be part of a room with others.
2. Another user edits the rooms permissions.
3. This leads to a notification and an unread message in this room.

### Outcome

#### What did you expect?
When receiving messages in a room, that a user cannot see (hidden), we should avoid showing a notification since users will be confused and think Element is just being buggy.

#### What happened instead?
1. While participating in a room, where another User edits the rooms permissions, my client receives an invisible `m.room.power_levels` message.
2. This leads to a notification and an unread message in this room.

### Operating system

_No response_

### Browser information

_No response_

### URL for webapp

_No response_

### Application version

_No response_

### Homeserver

_No response_

### Will you send logs?

No