Updated fonts to Google Sans in Setup screens.

This change migrates the "All set" and Gesture Nav Tutorial screens to
use Google Sans fonts as aligned with SUW's design.

Before:
"All set" screen: https://screenshot.googleplex.com/7ptWroSfRiZLcRT.png
Gesture Nav Tutorial screen: https://screenshot.googleplex.com/6SuYs67NSD2WRkU.png

After:
"All set" screen: https://screenshot.googleplex.com/6UGrdR43h8aDJzU.png
Gesture Nav Tutorial screen: https://screenshot.googleplex.com/45NxPH2ezQsHxL4.png

Fix: 258241930
Test: Manual
Change-Id: I21cc19383f78e3d9e84b0d892cbd977f20b91e86