don't adapt any gray colors to 565

Adapting gray to 565 will add a noticeable purple/green tint.
I'd rather only the 565 images in Gold were tainted with that.

Change-Id: Ib09e92b2f78c6de086345124e9eefeb31bbb5fa8
Reviewed-on: https://skia-review.googlesource.com/147422
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/gm/bitmapfilters.cpp b/gm/bitmapfilters.cpp
index 3d20e57..0551c02 100644
--- a/gm/bitmapfilters.cpp
+++ b/gm/bitmapfilters.cpp
@@ -74,7 +74,7 @@
     SkBitmap    fBM4444, fBM16, fBM32;
 
     FilterGM() {
-        this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
+        this->setBGColor(0xFFDDDDDD);
     }
 
 protected: