Merge "Eliminate redundant churn in SharedPreferences"

    /** Work queued via {@link #queue} */

    @GuardedBy("sLock")

    private static final LinkedList<Runnable> sWork = new LinkedList<>();

    private static LinkedList<Runnable> sWork = new LinkedList<>();

    /** If new work can be delayed or not */

    @GuardedBy("sLock")

            LinkedList<Runnable> work;

            synchronized (sLock) {

                work = (LinkedList<Runnable>) sWork.clone();

                sWork.clear();

                work = sWork;

                sWork = new LinkedList<>();

                // Remove all msg-s as all work will be processed now

                getHandler().removeMessages(QueuedWorkHandler.MSG_RUN);