Update fontMgr to take list of bcp47 language tags.

gm/fontmgr.cpp

Index: gm/fontmgr.cpp
diff --git a/gm/fontmgr.cpp b/gm/fontmgr.cpp
index 79868982f4a25854a5d7b4bee1aa498b3188438d..287d05b04226c2c16224e88eafafaa6131f3a254 100644
--- a/gm/fontmgr.cpp
+++ b/gm/fontmgr.cpp
@@ -31,7 +31,7 @@ static SkScalar drawCharacter(SkCanvas* canvas, uint32_t character, SkScalar x,
     // find typeface containing the requested character and draw it
     SkString ch;
     ch.appendUnichar(character);
-    SkTypeface* typeface = fm->matchFamilyStyleCharacter(fontName, fontStyle, bpc47, character);
+    SkTypeface* typeface = fm->matchFamilyStyleCharacter(fontName, fontStyle, &bpc47, 1, character);
     SkSafeUnref(paint.setTypeface(typeface));
     x = drawString(canvas, ch, x, y, paint) + 20;