Merge "Alter IDs considered in TimeZoneLookupHelper"

    private static OffsetResult lookupByInstantOffsetDst(long timeMillis, int utcOffsetMillis,

            @Nullable Boolean isDst) {

        String[] zones = TimeZone.getAvailableIDs();

        // Use java.util.TimeZone and not android.icu.util.TimeZone to find candidate zone IDs: ICU

        // references some non-standard zone IDs that can be rejected by java.util.TimeZone. There

        // is a CTS test (in com.android.i18n.test.timezone.TimeZoneIntegrationTest) that confirms

        // that ICU can interpret all IDs that are known to java.util.TimeZone.

        String[] zones = java.util.TimeZone.getAvailableIDs();

        TimeZone match = null;

        boolean isOnlyMatch = true;

        for (String zone : zones) {

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertFalse;

import static org.junit.Assert.assertNotNull;

import static org.junit.Assert.assertNull;

import static org.junit.Assert.assertTrue;

import org.junit.Before;

import org.junit.Test;

import java.util.Arrays;

import java.util.Calendar;

import java.util.Date;

import java.util.List;

import java.util.concurrent.TimeUnit;

public class TimeZoneLookupHelperTest {

        assertTrue(mTimeZoneLookupHelper.countryUsesUtc("gb", NH_WINTER_TIME_MILLIS));

    }

    @Test

    public void regressionTest_Bug167653885() {

        // This NITZ caused an error in Android R because lookupByNitz was returning a time zone

        // known to android.icu.util.TimeZone but not java.util.TimeZone.

        NitzData nitzData = NitzData.parse("20/05/08,04:15:48+08,00");

        OffsetResult offsetResult = mTimeZoneLookupHelper.lookupByNitz(nitzData);

        assertNotNull(offsetResult);

        List<String> knownIds = Arrays.asList(java.util.TimeZone.getAvailableIDs());

        assertTrue(knownIds.contains(offsetResult.getTimeZone().getID()));

    }

    /**

     * Assert the time zone in the OffsetResult has the expected properties at the specified time.

     */