Downloadable fonts in android. How to find out which of them are already in the cache on the phone?

Question

Android

https://developer.android.com/guide/topics/ui/look...
Actually the two proposed classes contract and provider do not solve my problem.
I wanted to google the source code of com.google.android.gms.fonts to see if there are
any other options for getting data. But the answer comes across like
https://helperbyte.com/questions/488355/where-can-...
i.e. the person was looking for the same thing.

Actually why do I need this. There is an idea to make a font picker for 1200+ google fonts.
The names of the fonts that are already in the phone are displayed in the font itself and show them at the top of the list.