forgot to add the copyright text that nobody reads in the icon file

Signed-off-by: Julius Linus <juliuslinus1@gmail.com>

app/src/main/res/drawable/ic_baseline_keyboard_double_arrow_down_24.xml

@@ -1,3 +1,16 @@
+<!--
+    @author Google LLC
+    Copyright (C) 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
+    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.
+-->
 <vector android:height="24dp" android:tint="#000"
     android:viewportHeight="24" android:viewportWidth="24"
     android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">