Creation of empty room after a very long room name with emoji's

### Steps to reproduce

1. Where are you starting? What can you see?
I creating a new room. I see the window of the room creation.

2. What do you click?
I click on the naam input field and put 500 emoji's in it. I get the error: An error occurred when creating a room.
When i do this on the web element x then i get the error of payload is to long.

### Outcome

#### What did you expect?
I expect a good error message in the android app. Something like in the web version.
And there must not be an empty room.

#### What happened instead?
But when I do it in android and in web after the error I click cancel for creating the room. But there is a empty room created.

### Your phone model

google 8a

### Operating system version

Android 16

### Application version and app store

Element X 25.06.02

### Homeserver

matrix.org

### Will you send logs?

No

### Are you willing to provide a PR?

No

Reproduce the issue through the Android room-creation flow using a very long emoji-only room name, then compare the resulting behavior with the web version's payload-too-long error. The work is done when the Android app reports a useful validation error and does not leave an empty room after cancellation or failure.

Written by the indexing model from the issue text.