am 217814bf: Merge "ImageReader: free direct byte buffers once Image is returned" into lmp-mr1-dev

import java.lang.ref.WeakReference;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.nio.NioUtils;

/**

 * <p>The ImageReader class allows direct application access to image data

            }

            private void clearBuffer() {

                // Need null check first, as the getBuffer() may not be called before an image

                // is closed.

                if (mBuffer == null) {

                    return;

                }

                if (mBuffer.isDirect()) {

                    NioUtils.freeDirectBuffer(mBuffer);

                }

                mBuffer = null;

            }