Its a weird way but since android have a diferent way to read app data files this may work
From renpy's wiki:
This might not exist, in which case you may create it. Files in this directory are loaded in preference to files in the androids packages, which means that patches can be placed in this directory .
This works in the same way for mod files
Place the mod game folder in
(the game internal name can change depending of the game)
Example of old cg kota mod in Android
How the folder looks (w full path)
(the traceback error was because i loaded an old save file)
Anyway, make sure to backup your save data, some mods may not work or have some errors if the android build is different from pc build
If you want to remove the mod just delete the "game" folder, make sure to not delete any other thing outside of that folder.