FontStrike.getGlyphVectorOutline() (and related logic) is not actually used.
This presumable started in 1.5 and motivated by the idea to avoid some unnecessary
work creating paths of different formats.

However, this is possible that reanabling usage of this method (instead of processing
glyphs individually) may help to improve performance perf tests when you test
just this one thing (create a text layout, get it's outline, throw it away).

If it does not show up in any significant way then we can remove this and related dead code
(including native calls).

See comments section for more detailed discussion.