Update Android port

Update Android port

* src/sfnt.c (sfnt_decompose_compound_glyph): New argument
GET_METRICS.  Call this function to retrieve glyph metrics used
to compute phantom points when a component glyph's anchor point
is one.
(sfnt_decompose_glyph, sfnt_build_glyph_outline): Plumb
GET_METRICS these two functions.
(sfnt_interpret_shc): Don't shift the provided reference point.
(sfnt_transform_f26dot6): Eschew looping through X and Y if no
offsets are provided.
(sfnt_interpret_compound_glyph_2): Discontinue initializing
phantom points here.
(sfnt_interpret_compound_glyph_1): Do not incorporate phantom
points into the ultimately produced glyph outline.  Correctly
provide for phantom childanchor points.
(sfnt_test_get_metrics, main): Update tests.

* src/sfnt.h: Update prototypes.

* src/sfntfont.c (struct sfntfont_get_glyph_outline_dcontext):
New fields `hmtx', `hhea' and `maxp'.
(sfntfont_get_metrics): New function.
(sfntfont_get_glyph_outline): Provide new tables and the new
callback function.