Merge "Update the timestamp used for time zone filtering"

 */

public class FilteredCountryTimeZones {

    // New timezone list and the meta data of time zone, notUsedAfter, is introduced in Android P

    // in 2018. Only show time zone used in or after 2018.

    private static final long MIN_USE_DATE_OF_TIMEZONE = 1514764800000L; // 1/1/2018 00:00 UTC

    /**

     * The timestamp used to determine which time zones to show to users by using the notUsedAfter

     * metadata Android holds for each time zone.

     *

     * notUsedAfter exists because some time zones effectively "merge" with other time zones after

     * a given point in time (i.e. they have identical transitions, offsets, etc.). After that

     * point we only need to show one of the functionally identical ones.

     *

     * Rather than using System.currentTimeMillis(), UX folks asked for consistent behavior and so

     * a timestamp known to be in the recent past is used. This should be updated occasionally but

     * it doesn't have to be very often.

     */

    private static final long MIN_USE_DATE_OF_TIMEZONE = 1546300800000L; // 1/1/2019 00:00 UTC

    private final CountryTimeZones mCountryTimeZones;

    private final List<String> mTimeZoneIds;