Fix two font issue that are causing crashes and ANRs

1) fixes a bug where the a custom font can be loaded prior to the
   system fonts being loaded when Skia is first loaded.
2) fixes a bug where the lists for system fonts and fallbacks can be
   corrupted if the font in the configuration file is not present

This should fix bug 5911298

Change-Id: I93b93e0f20d916b91438e8bbaa50a32ac5e20d88
1 file changed