Merge "Move EntropyMixer I/O from main thread to I/O thread"

    /**

     * Handler that periodically updates the entropy on disk.

     */

    private final Handler mHandler = new Handler() {

    private final Handler mHandler = new Handler(IoThread.getHandler().getLooper()) {

        // IMPLEMENTATION NOTE: This handler runs on the I/O thread to avoid I/O on the main thread.

        // The reason we're using our own Handler instead of IoThread.getHandler() is to create our

        // own ID space for the "what" parameter of messages seen by the handler.

        @Override

        public void handleMessage(Message msg) {

            if (msg.what != ENTROPY_WHAT) {

        IntentFilter broadcastFilter = new IntentFilter(Intent.ACTION_SHUTDOWN);

        broadcastFilter.addAction(Intent.ACTION_POWER_CONNECTED);

        broadcastFilter.addAction(Intent.ACTION_REBOOT);

        context.registerReceiver(mBroadcastReceiver, broadcastFilter);

        context.registerReceiver(

                mBroadcastReceiver,

                broadcastFilter,

                null, // do not require broadcaster to hold any permissions

                mHandler // process received broadcasts on the I/O thread instead of the main thread

                );

    }

    private void scheduleEntropyWriter() {