Remove dependency on src/android from dm and nanobench

src/android/SkBitmapRegionDecoderPriv.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkBitmapRegionDecoderPriv_DEFINED
 #define SkBitmapRegionDecoderPriv_DEFINED
 
-inline float get_scale_from_sample_size(uint32_t sampleSize) {
-    return 1.0f / (float) sampleSize;
-}
-
 enum SubsetType {
     kFullyInside_SubsetType,
     kPartiallyInside_SubsetType,
     kOutside_SubsetType,
 };
 
 /*
  * Corrects image subset offsets and dimensions in order to perform a valid decode.
  * Also indicates if the image subset should be placed at an offset within the
  * output bitmap.
@@ skipping 29 matching lines @@
     subset->setXYWH(left, top, width, height);
     if ((*outX != 0) || (*outY != 0) || (width != subset->width()) ||
             (height != subset->height())) {
         return SubsetType::kPartiallyInside_SubsetType;
     }
 
     return SubsetType::kFullyInside_SubsetType;
 }
 
 #endif // SkBitmapRegionDecoderPriv_DEFINED