Move X509TrustManagerExtensionsTest to JUnit4

package android.net.http;

import static org.junit.Assert.fail;

import androidx.test.ext.junit.runners.AndroidJUnit4;

import com.android.org.conscrypt.TrustManagerImpl;

import org.junit.Test;

import org.junit.runner.RunWith;

import java.security.KeyStore;

import java.security.cert.X509Certificate;

import javax.net.ssl.TrustManagerFactory;

import javax.net.ssl.X509TrustManager;

import junit.framework.TestCase;

import com.android.org.conscrypt.TrustManagerImpl;

public class X509TrustManagerExtensionsTest extends TestCase {

@RunWith(AndroidJUnit4.class)

public class X509TrustManagerExtensionsTest {

    private class NotATrustManagerImpl implements X509TrustManager {

        }

    }

    @Test

    public void testBadCast() throws Exception {

        NotATrustManagerImpl ntmi = new NotATrustManagerImpl();

        try {

        }

    }

    @Test

    public void testGoodCast() throws Exception {

        String defaultType = KeyStore.getDefaultType();

        TrustManagerImpl tmi = new TrustManagerImpl(KeyStore.getInstance(defaultType));

        X509TrustManagerExtensions tme = new X509TrustManagerExtensions(tmi);

    }

    @Test

    public void testNormalUseCase() throws Exception {

        String defaultAlgorithm = TrustManagerFactory.getDefaultAlgorithm();

        TrustManagerFactory tmf = TrustManagerFactory.getInstance(defaultAlgorithm);