Improve Okular For Android

Okular has an Android version, but it has some issues. PDFs without embedded fonts don’t display properly due to the lack of an Android-specific font API in the Poppler backend. Icons also do not render, due to problems in KDE Frameworks or the Kirigami UI framework.

This project aims to implement an Android-specific font API in the Poppler backend, as well as solving the issue of icon rendering in Okular’s Android version.