Description of problem:
Currently we have a .conf file for Noto Sans CJK.
I think we should add corresponding .conf files for Sans Mono and Serif?

For example this would reduce the number of Mono/Serif fonts suggested for CJK langs.

Version-Release number of selected component (if applicable):
google-noto-cjk-fonts-20201206-5.fc37


Steps to Reproduce:
1. fc-list :lang=ja family | grep -v JP
2. fc-list :lang=ko family | grep -v KR
3. fc-list :lang=zh-cn family | grep -v SC
:

Actual results:
$ fc-list :lang=ja family | grep -v JP | grep -v Droid
Noto Serif CJK KR
Noto Serif CJK HK
Noto Serif CJK SC
Noto Serif CJK TC
Noto Sans Mono CJK SC
Noto Sans Mono CJK TC
Noto Sans Mono CJK HK
Noto Sans Mono CJK KR

Expected results:
Non-Japanese matches shouldn't appear