ask skia to use flat gamma when rendering fonts from hwui

Bug: 13748392
Change-Id: I6930629b8e900628f15354f663b86dfb29a4db78
diff --git a/libs/hwui/font/Font.h b/libs/hwui/font/Font.h
index 02197bc..6ddd4f2 100644
--- a/libs/hwui/font/Font.h
+++ b/libs/hwui/font/Font.h
@@ -19,6 +19,8 @@
 
 #include <utils/KeyedVector.h>
 
+#include <SkScalar.h>
+#include <SkDeviceProperties.h>
 #include <SkGlyphCache.h>
 #include <SkScalerContext.h>
 #include <SkPaint.h>
@@ -146,6 +148,7 @@
     DefaultKeyedVector<glyph_t, CachedGlyphInfo*> mCachedGlyphs;
 
     bool mIdentityTransform;
+    SkDeviceProperties mDeviceProperties;
 };
 
 inline int strictly_order_type(const Font::FontDescription& lhs,