Anime keeps playing after closing picture in picture mode

### Steps to reproduce

Open an anime
Go into picture in picture mode
Press the x on the picture in picture

### Expected behavior

The anime should stop playing entirely

### Actual behavior

The anime pauses for a second and then continues to play in the background even though the player has been closed.

### Crash logs

_No response_

### Aniyomi version

0.18.0.1

### Android version

Android 15

### Device

Samsung galaxy a15 5g

### Other details

_No response_

### Acknowledgements

- [x] I have searched the existing issues and this is a new ticket, **NOT** a duplicate or related to another open or closed issue.
- [x] I have written a short but informative title.
- [x] If this is an issue with an extension, I should be opening an issue in the extension's repository.
- [x] I have gone through the [FAQ](https://aniyomi.org/docs/faq/general) and [troubleshooting guide](https://aniyomi.org/docs/guides/troubleshooting/).
- [x] I have updated the app to version **[0.18.0.1](https://github.com/aniyomiorg/aniyomi/releases/latest)**.
- [x] I have filled out all of the requested information in this form, including specific version numbers.
- [x] I understand that **Aniyomi does not have or fix any extensions**, and I **will not receive help** for any issues related to sources or extensions.