Respect that status property when parsing fstab from device tree

        std::vector<std::string> fstab_entry;

        std::string file_name;

        std::string value;

        // skip a partition entry if the status property is present and not set to ok

        file_name = android::base::StringPrintf("%s/%s/status", fstabdir_name.c_str(), dp->d_name);

        if (read_dt_file(file_name, &value)) {

            if (value != "okay" && value != "ok") {

                LINFO << "dt_fstab: Skip disabled entry for partition " << dp->d_name;

                continue;

            }

        }

        file_name = android::base::StringPrintf("%s/%s/dev", fstabdir_name.c_str(), dp->d_name);

        if (!read_dt_file(file_name, &value)) {

            LERROR << "dt_fstab: Failed to find device for partition " << dp->d_name;