Update `ویکی‌پدیای پزشکی آفلاین` to support Android 15.

See issue https://github.com/kiwix/kiwix-android/issues/4270. As our Kiwix app now supports Android 15 so our custom app should also support Android 15.

**Folder Name:** [wikimedfa](https://github.com/kiwix/kiwix-android-custom/tree/main/wikimedfa)
**Package Name:** `org.kiwix.kiwixcustomwikimedfa`


![Image](https://github.com/user-attachments/assets/4652e0fc-3358-492e-9cea-af07bc1ae738)