Create an SkAndroidCodec API separate from SkCodec

src/codec/SkCodec_libpng.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCodec_libpng.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
 #include "SkColorTable.h"
 #include "SkBitmap.h"
 #include "SkMath.h"
-#include "SkScaledCodec.h"
 #include "SkSize.h"
 #include "SkStream.h"
 #include "SkSwizzler.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 // Helper macros
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifndef png_jmpbuf
 #  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
@@ skipping 811 matching lines @@
     }
 
     if (1 == numberPasses) {
         return new SkPngScanlineDecoder(imageInfo, streamDeleter.detach(), png_ptr, info_ptr,
                                         bitDepth);
     }
 
     return new SkPngInterlacedScanlineDecoder(imageInfo, streamDeleter.detach(), png_ptr,
                                               info_ptr, bitDepth, numberPasses);
 }