Merge "Add support for "empty" server-side flag values"

     */

    @NonNull

    public Optional<String[]> getOptionalStringArray(@DeviceConfigKey String key) {

        Optional<String> string = getOptionalString(key);

        if (!string.isPresent()) {

        Optional<String> optionalString = getOptionalString(key);

        if (!optionalString.isPresent()) {

            return Optional.empty();

        }

        return Optional.of(string.get().split(","));

        // DeviceConfig appears to have no way to specify an empty string, so we use "_[]_" as a

        // special value to mean a zero-length array.

        String value = optionalString.get();

        if ("_[]_".equals(value)) {

            return Optional.of(new String[0]);

        }

        return Optional.of(value.split(","));

    }

    /**

                }

                int[] priorityInts = null;

                if (priorityStrings != null && priorityStrings.length > 0) {

                if (priorityStrings != null) {

                    priorityInts = new int[priorityStrings.length];

                    try {

                        for (int i = 0; i < priorityInts.length; i++) {