Update source file license headers

#12

PiperOrigin-RevId: 484541771
Change-Id: Iacd95585a039aceec8a5d876eea4915ed19995b7
diff --git a/src/common/golang/pprint.go b/src/common/golang/pprint.go
index e0d7e75..221ff0f 100644
--- a/src/common/golang/pprint.go
+++ b/src/common/golang/pprint.go
@@ -1,3 +1,17 @@
+// Copyright 2022 The Bazel Authors. All rights reserved.
+//
+// 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 pprint provides colored "pretty print" output helper methods
 package pprint
 
diff --git a/src/java/com/example/sampleapp/native.c b/src/java/com/example/sampleapp/native.c
index d221826..021bfa5 100644
--- a/src/java/com/example/sampleapp/native.c
+++ b/src/java/com/example/sampleapp/native.c
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2022 The Bazel Authors. All rights reserved.
+ *
+ * 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.
+ */
 #include <string.h>
 #include <jni.h>
 
diff --git a/src/tools/ak/finalrjar/finalrjar_test.go b/src/tools/ak/finalrjar/finalrjar_test.go
index 2cfcf94..fffd1b9 100644
--- a/src/tools/ak/finalrjar/finalrjar_test.go
+++ b/src/tools/ak/finalrjar/finalrjar_test.go
@@ -1,3 +1,18 @@
+// Copyright 2022 The Bazel Authors. All rights reserved.
+//
+// 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 finalrjar generates a valid final R.jar.
 package finalrjar
 
 import (