Re-license apmanager to Apache2

This patch automatically replaced the license on all text files from
Chromium OS (BSD style) to AOSP (Apache2), keeping the original year as
a reference.

The license header was added to .gyp, the NOTICE was replaced with a copy
of the Apache2 license and MODULE_LICENSE_* file was updated.

BUG=23619937
TEST=grep 'Chromium OS Authors' doesn't find anything.

Change-Id: I4ade0a15ff18ab159d4a2f99525b62c780b13c89
diff --git a/apmanager.gyp b/apmanager.gyp
index 4afea9a..317762b 100644
--- a/apmanager.gyp
+++ b/apmanager.gyp
@@ -1,3 +1,19 @@
+#
+# Copyright (C) 2015 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.
+#
+
 {
   'target_defaults': {
     'variables': {