Don't do single byte writes in DropBoxManagerService

import com.android.internal.os.IDropBoxManagerService;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileDescriptor;

import java.io.FileOutputStream;

            // the data in uncompressed form.

            temp = new File(mDropBoxDir, "drop" + Thread.currentThread().getId() + ".tmp");

            output = new FileOutputStream(temp);

            int bufferSize = mBlockSize;

            if (bufferSize > 4096) bufferSize = 4096;

            if (bufferSize < 512) bufferSize = 512;

            output = new BufferedOutputStream(new FileOutputStream(temp), bufferSize);

            if (read == buffer.length && ((flags & DropBoxManager.IS_GZIPPED) == 0)) {

                output = new GZIPOutputStream(output);

                flags = flags | DropBoxManager.IS_GZIPPED;