Merge "Increase the keep alive time for internal executor thread" into main

        mUsers = users != null ? users : new SparseArray<>();

        mHandler = new MainHandler();

        mInternalExecutor = new ThreadPoolExecutor(/* corePoolSize */ 0, /* maximumPoolSize */ 1,

                /* keepAliveTime */ 1, TimeUnit.SECONDS, new LinkedBlockingQueue<>());

                /* keepAliveTime */ 24, TimeUnit.HOURS, new LinkedBlockingQueue<>());

        mUserVisibilityMediator = new UserVisibilityMediator(mHandler);

        mUserDataPreparer = userDataPreparer;

        mUserTypes = UserTypeFactory.getUserTypes();