Kannada in Google Sans

**Describe the issue**
Kannada appears to supported in Google Sans font, after checking the glyphset, but doesn't appear if select the script as Kannada
**To Reproduce**
https://fonts.google.com/?script=Knda
Among the Kannada fonts, Google Sans does not get listed
But gets listed for other scripts, like Telugu

**Expected behavior**
Kannada script can appear in this list under
https://fonts.google.com/specimen/Google+Sans/glyphs?query=Google
Glyphs and Languages
and When we select the Writing System as Kannada, Google Sans need to appear

**Screenshots**

in Font Book, Mac

Start by comparing the Google Fonts Kannada script results with the Google Sans glyphs and languages page linked in the issue. Trace where script support is determined for font listing, then verify that Google Sans appears for Kannada without changing its behavior for other scripts.

Written by the indexing model from the issue text.