When switching to fetching fonts directly from Gerrit in
d46a08bd12, 'Roboto Mono' got pointed to
'Roboto' (without 'Mono') instead of 'Roboto Mono' (with 'Mono')
by accident.
We point 'Roboto Mono' to the expected 'Mono' variants of 'Roboto'.
Issue: 12980
Change-Id: I491435ad6295c3df0fc6d41f91df16e2fc5cea5d