[base] Replace SkFontMgr::RefDefault() with FreeTypeFontMgr

Android Renderengine doesn't draw any text, but hwui needs
to turn bytes into SkTypefaces and it currently uses Skia's
"Empty Custom" SkFontMgr, which is really just a wrapper around
FreeType. This makes that connection explicit instead of relying
on SkFontMgr::RefDefault(), which is going away soon.

Change-Id: Ida96538c76e069ec86e8dc078ef329cfaeac5d78
Bug: b/305780908
diff --git a/libs/hwui/Android.bp b/libs/hwui/Android.bp
index da728f9..79a7357 100644
--- a/libs/hwui/Android.bp
+++ b/libs/hwui/Android.bp
@@ -553,6 +553,7 @@
         "utils/Blur.cpp",
         "utils/Color.cpp",
         "utils/LinearAllocator.cpp",
+        "utils/TypefaceUtils.cpp",
         "utils/VectorDrawableUtils.cpp",
         "AnimationContext.cpp",
         "Animator.cpp",