Implement matchFamilyStyle for SkFontMgr_fontconfig

src/fonts/SkFontMgr_fontconfig.cpp

Index: src/fonts/SkFontMgr_fontconfig.cpp
diff --git a/src/fonts/SkFontMgr_fontconfig.cpp b/src/fonts/SkFontMgr_fontconfig.cpp
index fedd3dc53360fc3646ec5bdd23092ab800b06fbe..c0cdccfdcadf02ced22961afbc2d9fbb12366980 100644
--- a/src/fonts/SkFontMgr_fontconfig.cpp
+++ b/src/fonts/SkFontMgr_fontconfig.cpp
@@ -281,7 +281,11 @@ protected:
     }
 
     SkTypeface* onMatchFamilyStyle(const char familyName[],
-                                   const SkFontStyle&) const override { return nullptr; }
+                                   const SkFontStyle& style) const override {
+        FCLocker lock;
+        return FontConfigTypeface::LegacyCreateTypeface(familyName, style);
+    }
+
     SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
                                             const char* bcp47[], int bcp47Count,
                                             SkUnichar character) const override {