R1:96edc9d2bc8f

Roll out more FontIcons

Summary: Sidenav launcher, search typeahead results, apps launcher

Test Plan:
Used each of these items

{F275814}

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11499