build: Enforce stylelints on function calls

build: Enforce stylelints on function calls

* Function calls to calc should use operators with spaces
* Function calls should not be split over lines
* Function calls should have a space after each comma
* Function calls should have space inside of the parentheses
* Function calls should not quote url parameters

Change-Id: Ia35f0bb5ca2dde23ce4ec90256b4fa958203e1cc