Update headers tools files.
The checkstyle header check now requires to have the year 2009 which is the
year Beem was first released.
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" type="line">
<stroke android:width="1dp"
android:height="2dp"
android:color="#D6F94C" />
<size android:height="1dp" />
</shape>