MINOR: Fix an example in the Kafka Streams tutorial to be compilable
Reviewers: Chia-Ping Tsai
package myapps;
import org.apache.kafka.common.serialization.Serdes;
+ import org.apache.kafka.common.utils.Bytes;
import org.apache.kafka.streams.KafkaStreams;
import org.apache.kafka.streams.StreamsBuilder;
import org.apache.kafka.streams.StreamsConfig;
import org.apache.kafka.streams.Topology;
import org.apache.kafka.streams.kstream.KStream;
+ import org.apache.kafka.streams.kstream.Materialized;
+ import org.apache.kafka.streams.kstream.Produced;
+ import org.apache.kafka.streams.state.KeyValueStore;
import java.util.Arrays;
import java.util.Locale;
