Filter font list, use Fontconfig and build on Ozone

Filter font list, use Fontconfig and build on Ozone

Since we dropped support for rendering Type 1 fonts in Chrome, we should
filter the list of fonts that can be configured as defaults to only
display fonts that have the right font format, i.e. TrueType or CFF.

A a side effect, this allows us to build the font list enumeration for
ozone as well, as it is only dependent on Fontconfig after this CL, not
dependent on Pango anymore.

For backwards compability with the old implementation, we're adding
three Fontconfig alias families Sans, Serif and Monospace to the list,
since our default settings on Linux included the "Monospace" family for
the fixed width font.

BUG=630508, 457307
Review-Url: https://codereview.chromium.org/2278143002
Cr-Commit-Position: refs/heads/master@{#414677}
(cherry picked from commit e70ca0a2e161e47a7f36f94c19e5a9c6448a15b9)