feat: copy backup checkstyle fixes

Author: ansh0l

samples/snippets/src/main/java/com/example/spanner/SpannerSample.java

@@ -63,8 +63,8 @@
 import com.google.spanner.admin.database.v1.RestoreDatabaseMetadata;
 import com.google.spanner.admin.database.v1.UpdateDatabaseDdlMetadata;
 import com.google.spanner.v1.ExecuteSqlRequest.QueryOptions;
-import java.math.BigDecimal;
 import java.lang.Math;
+import java.math.BigDecimal;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -1614,7 +1614,8 @@ static void createBackup(DatabaseAdminClient dbAdminClient, DatabaseId databaseI
   // [END spanner_create_backup]
 
   // [START spanner_copy_backup]
-  static void copyBackup(DatabaseAdminClient dbAdminClient, BackupId backupId, String sourceBackupId) {
+  static void copyBackup(DatabaseAdminClient dbAdminClient,
+      BackupId backupId, String sourceBackupId) {
 
     // Creates a copy backup of an existing backup with tables
     Backup backup = dbAdminClient