Use a wrapper for SkDebugf in SkCodec.

It can be silenced or not with one flag.
Always print when building for the android framework.

Also remove the meaningless define of override to override.

BUG=skia:3257

Review URL: https://codereview.chromium.org/1032093004
diff --git a/src/codec/SkMasks.cpp b/src/codec/SkMasks.cpp
index 1c542ce..4b32c61 100644
--- a/src/codec/SkMasks.cpp
+++ b/src/codec/SkMasks.cpp
@@ -5,6 +5,7 @@
  * found in the LICENSE file.
  */
 
+#include "SkCodecPriv.h"
 #include "SkMasks.h"
 #include "SkTypes.h"
 
@@ -106,7 +107,7 @@
         }
         // Check that the mask is continuous
         if (tempMask != 0) {
-            SkDebugf("Warning: Bit masks is not continuous.\n");
+            SkCodecPrintf("Warning: Bit masks is not continuous.\n");
         }
         // Truncate masks greater than 8 bits
         if (size > 8) {