Create an SkAndroidCodec API separate from SkCodec

src/codec/SkMaskSwizzler.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 "SkCodecPriv.h"
 #include "SkColorPriv.h"
 #include "SkMaskSwizzler.h"
-#include "SkScaledCodec.h"
 
 static SkSwizzler::ResultAlpha swizzle_mask16_to_n32_opaque(
         void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks,
         uint32_t startX, uint32_t sampleX) {
 
     // Use the masks to decode to the destination
     uint16_t* srcPtr = ((uint16_t*) srcRow) + startX;
     SkPMColor* dstPtr = (SkPMColor*) dstRow;
     for (int i = 0; i < width; i++) {
         uint16_t p = srcPtr[0];
@@ skipping 370 matching lines @@
 
 /*
  *
  * Swizzle the specified row
  *
  */
 SkSwizzler::ResultAlpha SkMaskSwizzler::swizzle(void* dst, const uint8_t* SK_RESTRICT src) {
     SkASSERT(nullptr != dst && nullptr != src);
     return fRowProc(dst, src, fDstWidth, fMasks, fX0, fSampleX);
 }