Remove lookup3 gamma code

Also clean up gamma / glyph cache properties

Change-Id: I75b1ac0cb55638bf787ffd3cf457483ae314f03b
diff --git a/libs/hwui/FontRenderer.h b/libs/hwui/FontRenderer.h
index 2954975..936c838 100644
--- a/libs/hwui/FontRenderer.h
+++ b/libs/hwui/FontRenderer.h
@@ -72,16 +72,12 @@
 
 class FontRenderer {
 public:
-    FontRenderer();
+    FontRenderer(const uint8_t* gammaTable);
     ~FontRenderer();
 
     void flushLargeCaches(std::vector<CacheTexture*>& cacheTextures);
     void flushLargeCaches();
 
-    void setGammaTable(const uint8_t* gammaTable) {
-        mGammaTable = gammaTable;
-    }
-
     void setFont(const SkPaint* paint, const SkMatrix& matrix);
 
     void precache(const SkPaint* paint, const char* text, int numGlyphs, const SkMatrix& matrix);