Truncate operator name to fit into SystemProp size

        if (SubscriptionManager.isValidPhoneId(phoneId)) {

            List<String> newList = updateTelephonyProperty(

                    TelephonyProperties.operator_alpha(), phoneId, name);

            try {

                TelephonyProperties.operator_alpha(newList);

            } catch (IllegalArgumentException e) { //property value is longer than the byte limit

                Log.e(TAG, "setNetworkOperatorNameForPhone: ", e);

                int numberOfEntries = newList.size();

                int maxOperatorLength = //save 1 byte for joiner " , "

                        (SystemProperties.PROP_VALUE_MAX - numberOfEntries) / numberOfEntries;

                //examine and truncate every operator and retry

                for (int i = 0; i < newList.size(); i++) {

                    if (newList.get(i) != null) {

                        newList.set(i, TextUtils

                                .truncateStringForUtf8Storage(newList.get(i), maxOperatorLength));

                    }

                }

                TelephonyProperties.operator_alpha(newList);

                Log.e(TAG, "successfully truncated operator_alpha: " + newList);

            }

        }

    }