Add INTERACT_ACROSS_USERS permission for DocsUI AndroidManifest

    <uses-permission android:name="android.permission.CACHE_CONTENT" />

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <uses-permission android:name="android.permission.CHANGE_OVERLAY_PACKAGES" />

    <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS" />

    <application

        android:name=".DocumentsApplication"

/*

 * Copyright (C) 2020 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.

 */

package com.android.documentsui;

import android.Manifest;

import android.content.pm.PackageManager;

import com.android.documentsui.files.FilesActivity;

import org.junit.Test;

public class PermissionsTest extends ActivityTest<FilesActivity> {

    private static final String TAG = "PermissionsTest";

    public PermissionsTest() {

        super(FilesActivity.class);

    }

    @Override

    public void setUp() throws Exception {

        super.setUp();

    }

    @Test

    public void testPermissionGranted_interactAcrossUsers() {

        assertEquals(PackageManager.PERMISSION_GRANTED,

                context.checkSelfPermission(Manifest.permission.INTERACT_ACROSS_USERS));

    }

}