Enable 32-bits only assets.

Go away dithering!

Change-Id: Iee5ee2e9430606e732d9b0abb3adc9f68275bd6d
diff --git a/libs/hwui/TextureCache.cpp b/libs/hwui/TextureCache.cpp
index 612f04e..4977f46 100644
--- a/libs/hwui/TextureCache.cpp
+++ b/libs/hwui/TextureCache.cpp
@@ -133,7 +133,7 @@
                 GL_RGB, GL_UNSIGNED_SHORT_5_6_5, bitmap->getPixels());
         break;
     case SkBitmap::kARGB_8888_Config:
-        texture->blend = true;
+        texture->blend = !bitmap->isOpaque();
         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap->rowBytesAsPixels(), texture->height, 0,
                 GL_RGBA, GL_UNSIGNED_BYTE, bitmap->getPixels());
         break;