adding license header

diff --git a/platform_data/BUILD.bazel b/platform_data/BUILD.bazel
index 94ececc..21df383 100644
--- a/platform_data/BUILD.bazel
+++ b/platform_data/BUILD.bazel

@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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
+#
+#    https://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.
+
 exports_files([
     "defs.bzl",
 ])

diff --git a/platform_data/test/BUILD b/platform_data/test/BUILD
index 1b1d414..9ec3afc 100644
--- a/platform_data/test/BUILD
+++ b/platform_data/test/BUILD

@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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
+#
+#    https://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.
+
 load("//platform_data:defs.bzl", "platform_data")
 load(":analysis_tests.bzl", "platform_data_test", "write_target_platform_rule_test")
 

diff --git a/platform_data/test/analysis_tests.bzl b/platform_data/test/analysis_tests.bzl
index f0e4a90..d0046a6 100644
--- a/platform_data/test/analysis_tests.bzl
+++ b/platform_data/test/analysis_tests.bzl

@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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
+#
+#    https://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.
+
 """
 platform_data_test is an analysistest rule that takes a target_under_test (e.g platform_data target) and a value for expected_platform. The test rule implementation make asserts against the transitive target platforms to make sure that --platform is set properly by the transition. 
 """