Add missing copyright headers to a couple of Java test files (#10900)

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/10900

Reviewed By: akankshamahajan15

Differential Revision: D40825886

Pulled By: ltamasi

fbshipit-source-id: e60f74aa8a622c3c71e1fee420fd586728fb2b7b

java/src/test/java/org/rocksdb/MultiColumnRegressionTest.java

@@ -1,3 +1,9 @@
+//  Copyright (c) Meta Platforms, Inc. and affiliates.
+//
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
 package org.rocksdb;
 
 import static org.assertj.core.api.Assertions.assertThat;

java/src/test/java/org/rocksdb/PutMultiplePartsTest.java

@@ -1,3 +1,9 @@
+//  Copyright (c) Meta Platforms, Inc. and affiliates.
+//
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
 package org.rocksdb;
 
 import static org.assertj.core.api.Assertions.assertThat;