LibraryManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/* Copyright 2020 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.
*/
-->
<manifestxmlns:android="http://schemas.android.com/apk/res/android"
package="com.google.android.auth.testapp.lib" >

 <uses-sdkandroid:minSdkVersion='23'/>
 <application />
</manifest>