Update Android port

Update Android port

* src/sfnt.c (struct sfnt_graphics_state):
(LOOPCALL):
(DELTAC3):
(PROJECT):
(SHPIX):
(sfnt_save_projection_vector):
(sfnt_check_zp0):
(sfnt_dual_project_vector):
(sfnt_interpret_scfs):
(sfnt_round_symmetric):
(sfnt_interpret_miap):
(sfnt_interpret_alignrp_1):
(sfnt_interpret_alignrp):
(sfnt_measure_distance):
(sfnt_interpret_msirp):
(sfnt_interpret_ip):
(sfnt_interpret_mdap):
(sfnt_deltap):
(sfnt_dual_project_onto_any_vector):
(sfnt_validate_gs):
(sfnt_set_projection_vector):
(sfnt_interpret_shp):
(sfnt_interpret_run):
(sfnt_check_sloop):
(main): Check in more WIP font code.