Use MIN_MATCH 7 for PhoneNumberUtilsTest

import androidx.test.filters.FlakyTest;

import org.junit.After;

import org.junit.Before;

import org.junit.Ignore;

import org.junit.Test;

public class PhoneNumberUtilsTest {

    private static final int MIN_MATCH = 7;

    private int mOldMinMatch;

    @Before

    public void setUp() throws Exception {

        mOldMinMatch = PhoneNumberUtils.getMinMatchForTest();

        PhoneNumberUtils.setMinMatchForTest(MIN_MATCH);

    }

    @After

    public void tearDown() throws Exception {

        PhoneNumberUtils.setMinMatchForTest(mOldMinMatch);

    }

    @SmallTest

    @Test

    public void testExtractNetworkPortion() throws Exception {