am b0197033: Increase timeout when uncrypting OTA

            //

            // This preparation can take more than 20 seconds if

            // there's a very large update package, so lengthen the

            // timeout.

            // timeout.  We have seen 750MB packages take 3-4 minutes

            SystemProperties.set("ctl.start", "pre-recovery");

            duration = 120 * 1000L;

            duration = 300 * 1000L;

        } else {

            SystemProperties.set("sys.powerctl", "reboot," + reason);

            duration = 20 * 1000L;