jni calls for getting system font files
jni calls for getting system font files

- Tangram core passes "family", "weight" and "style" font properties, which are then looked up on android side to get
the system font file corresponding to these font properties.

quitejonny/tangram-es,tangrams/tangram-es,xvilan/tangram-es,xvilan/tangram-es,quitejonny/tangram-es,xvilan/tangram-es,cleeus/tangram-es,tangrams/tangram-es,quitejonny/tangram-es,tangrams/tangram-es,cleeus/tangram-es,tangrams/tangram-es,tangrams/tangram-es,quitejonny/tangram-es,cleeus/tangram-es,xvilan/tangram-es,tangrams/tangram-es,quitejonny/tangram-es,quitejonny/tangram-es,cleeus/tangram-es,cleeus/tangram-es,cleeus/tangram-es,tangrams/tangram-es