Add missing license headers

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I6a3e164b516220bc9608bab795859430f6cbff45
diff --git a/javatests/com/google/gerrit/plugins/codeowners/acceptance/batch/CodeOwnerSubmitRuleBatchIT.java b/javatests/com/google/gerrit/plugins/codeowners/acceptance/batch/CodeOwnerSubmitRuleBatchIT.java
index 8b51740..17d481c 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/acceptance/batch/CodeOwnerSubmitRuleBatchIT.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/acceptance/batch/CodeOwnerSubmitRuleBatchIT.java
@@ -1,3 +1,17 @@
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.gerrit.plugins.codeowners.acceptance.batch;
 
 import static com.google.common.truth.Truth.assertThat;
diff --git a/javatests/com/google/gerrit/plugins/codeowners/backend/proto/ProtoBackendTest.java b/javatests/com/google/gerrit/plugins/codeowners/backend/proto/ProtoBackendTest.java
index 01d7091..9714196 100644
--- a/javatests/com/google/gerrit/plugins/codeowners/backend/proto/ProtoBackendTest.java
+++ b/javatests/com/google/gerrit/plugins/codeowners/backend/proto/ProtoBackendTest.java
@@ -1,3 +1,17 @@
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package com.google.gerrit.plugins.codeowners.backend.proto;
 
 import static com.google.gerrit.truth.OptionalSubject.assertThat;