Make Leaving a Call Instant

### Your use case

After hitting the leave call button, it simply shows the call background for a while then actually leave the call screen.
#### What would you like to do?
Make leaving a call instant
#### Why would you like to do it?
To provide immediate feedback and avoid making it seem as though something is broken.
#### How would you like to achieve it?
Immediately close the call screen after pressing the Leave call button.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_

### Are you willing to provide a PR?

No

Start by locating the call screen and the Leave call button action in the Android app, then reproduce the delay after pressing it. Trace where the leave action triggers screen dismissal and verify that the call screen closes immediately while the call cleanup continues as needed.

Written by the indexing model from the issue text.