Merge "Use AppFuse to write document." into nyc-dev

import android.os.RemoteException;

import android.provider.DocumentsContract;

import android.provider.DocumentsContract.Document;

import android.system.ErrnoException;

import android.system.Os;

import android.text.format.DateUtils;

import android.util.Log;

import android.webkit.MimeTypeMap;

        ParcelFileDescriptor srcFile = null;

        ParcelFileDescriptor dstFile = null;

        InputStream in = null;

        OutputStream out = null;

        ParcelFileDescriptor.AutoCloseOutputStream out = null;

        boolean success = false;

        try {

                    makeCopyProgress(len);

                }

                // Need to invoke IoUtils.close explicitly to avoid from ignoring errors at flush.

                IoUtils.close(dstFile.getFileDescriptor());

                srcFile.checkError();

            } catch (IOException e) {

                throw new ResourceException(