Notification Setting: Invitations

### Your use case

Every group includes some form/hint of the word 'notification' (sound, notify etc) except in 'Additional settings' which only has a toggle next to the 'Invitations' label.
It's possible a user might think they're turning off invitations entirely and not just notifications for it.

#### What would you like to do?
1. Put "Invitations" under "Notify me for".
2. Remove the toggle when/if Invite notification filters are added.
#### Why would you like to do it?
Placing it under "Notify me for" and following the selection pattern of the other options would improve clarity and consistency with the rest of the page.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_

### Are you willing to provide a PR?

No

Start by locating the Android notification settings screen and compare the Invitations control with the other options under “Notify me for.” Move Invitations into that group or otherwise make its notification-only behavior clear, then verify the settings page presents a consistent selection pattern.

Written by the indexing model from the issue text.