Replace Thread.sleep() with SystemClock.sleep()

package com.fsck.k9.controller;

import android.os.SystemClock;

import java.io.CharArrayWriter;

import java.io.IOException;

import java.io.PrintWriter;

                queue.put(command);

                return;

            } catch (InterruptedException ie) {

                try {

                    Thread.sleep(200);

                } catch (InterruptedException ne) {

                }

                SystemClock.sleep(200);

                e = ie;

            }

        }