chore: Update the format of java-dataplex (#12694)

Updating the format of dataplex. Because the format check is
consistently failing for dataplex in an [unrelated
PR](https://github.com/googleapis/google-cloud-java/actions/runs/24046882489/job/70139210532?pr=12329).

However, this check is not failing for [other
PRs](#12688). So we
are not sure what is the cause of the inconsistent behavior.

Author: blakeli0

java-dataplex/grpc-google-cloud-dataplex-v1/src/main/java/com/google/cloud/dataplex/v1/ContentServiceGrpc.java

@@ -15,7 +15,6 @@
  */
 package com.google.cloud.dataplex.v1;
 
-
 /**
  *
  *