Refactor FontRenderer.cpp

FontRenderer.h defined several classes and structures that now live
in the font/ folder. This will make the code easier to read and
maintain.

Change-Id: I3dc044e9bde1d6515f8704f5c72462877d279fe2

Author: Romain Guy

libs/hwui/Android.mk

@@ -6,6 +6,8 @@ include $(CLEAR_VARS)
 ifeq ($(USE_OPENGL_RENDERER),true)
 	LOCAL_SRC_FILES:= \
 		utils/SortedListImpl.cpp \
+		font/CacheTexture.cpp \
+		font/Font.cpp \
 		FontRenderer.cpp \
 		GammaFontRenderer.cpp \
 		Caches.cpp \