Just had a meeting with Yuvi and we decided that we should keep the fonts
consistent on android app with android mobile web for the time being, and
not introducing another font (Open Sans) in the mix. The changes will take
a few minutes of work, and Yuvi has already made a card for it on trello.
The changes include keeping page styling consistent with mobile web on
android using Roboto for text and using Roboto for app chrome typography
too.