We parse features appended to font names in CommonSalLayout as well, so
code that takes care of their presence (striping them when searching,
hashing, etc.) should not be dependent on the old Graphite support or it
will not work when old Graphite is disabled (e.g. on macOS).

Change-Id: If040782a86ec76d3743baf4d2b1d7a194e8e13f2