Enforce cross user permission for getSplashScreenTheme API

        @Override

        public String getSplashScreenTheme(@NonNull String packageName, int userId) {

            final Computer snapshot = snapshotComputer();

            final int callingUid = Binder.getCallingUid();

            snapshot.enforceCrossUserPermission(

                    callingUid, userId, false /* requireFullPermission */,

                    false /* checkShell */, "getSplashScreenTheme");

            PackageStateInternal packageState = filterPackageStateForInstalledAndFiltered(snapshot,

                    packageName, Binder.getCallingUid(), userId);

                    packageName, callingUid, userId);

            return packageState == null ? null

                    : packageState.getUserStateOrDefault(userId).getSplashScreenTheme();

        }

/*

 * Copyright (C) 2022 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.server.pm.test.appenumeration;

import static org.junit.Assert.assertThrows;

import android.app.AppGlobals;

import android.app.Instrumentation;

import android.content.pm.IPackageManager;

import android.os.UserHandle;

import androidx.test.InstrumentationRegistry;

import androidx.test.runner.AndroidJUnit4;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

@RunWith(AndroidJUnit4.class)

public class CrossUserPackageVisibilityTests {

    private Instrumentation mInstrumentation;

    private IPackageManager mIPackageManager;

    @Before

    public void setup() {

        mInstrumentation = InstrumentationRegistry.getInstrumentation();

        mIPackageManager = AppGlobals.getPackageManager();

    }

    @Test

    public void testGetSplashScreenTheme_withCrossUserId() {

        final int crossUserId = UserHandle.myUserId() + 1;

        assertThrows(SecurityException.class,

                () -> mIPackageManager.getSplashScreenTheme(

                        mInstrumentation.getContext().getPackageName(), crossUserId));

    }

}