🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

google-cloud-logging/src/main/java/com/google/cloud/logging/Payload.java

@@ -18,10 +18,10 @@
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
+import com.google.cloud.Structs;
 import com.google.common.base.MoreObjects;
 import com.google.protobuf.Any;
 import com.google.protobuf.Struct;
-import com.google.cloud.Structs;
 import java.io.Serializable;
 import java.util.Map;
 import java.util.Objects;