They did not in the past but a quick look at https://fonts.googleapis.com/css?family=Noto+Sans shows that they do now, at least if you request it using a modern browser.

This is not surprising since the Chrome team is generally really aggressive about performance in general and they were quick to jump on this issue:

https://bugs.chromium.org/p/chromium/issues/detail?id=247920

On a related note, I've found the Chrome team to be really responsive about i18n as well – if you report something about even fairly obscure scripts not being supported, they usually respond rapidly. Quite pleasant to see.