Move SkBitmapRegionDecoder to include/android and src/android

tools/android/SkBRDAllocator.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 SkBRDAllocator_DEFINED
-#define SkBRDAllocator_DEFINED
-
-#include "SkBitmap.h"
-#include "SkCodec.h"
-
-/**
- *  Abstract subclass of SkBitmap's allocator.
- *  Allows the allocator to indicate if the memory it allocates
- *  is zero initialized.
- */
-class SkBRDAllocator : public SkBitmap::Allocator {
-public:
-
-    /**
-     *  Indicates if the memory allocated by this allocator is
-     *  zero initialized.
-     */
-    virtual SkCodec::ZeroInitialized zeroInit() const = 0;
-};
-
-#endif