Description:
Using emojis in Writer/Impress docs won't render in exported/printed PDF.

Steps to Reproduce:
1. Insert "😁" character into a new doc
2. Export or print to PDF
3. Open the PDF

Actual Results:
The emoji is not rendered

Expected Results:
The emoji must be rendered


Reproducible: Always


User Profile Reset: No

Additional Info:
- The resulting document does include that character, as `pdftotext` exported it ok, but it is not graphically rendered
- It's viewer irrelevant: exporting with `pdftoppm` or `pdftocairo` won't render it either
- It's export-options irrelevant: I've tried everything UI-possible
- `fc-match emoji` => Noto-COLRv1.ttf: "Noto Color Emoji" "Regular"
- `pdffonts` shows the `Noto-COLRv1.ttf` as embedded
- A colleague also running same setup can't render it as well, so it's not my-installation-only
- OS: Fedora Linux 44 (KDE Plasma Desktop Edition)
- LO: LibreOffice 26.2.3.2 620(Build:2)