boolean isAndroidUsesChronometer() {
        return options.optBoolean("androidUsesChronometer", false);
    }
Show the Notification#when field as a stopwatch. Instead of presenting when as a timestamp,
the notification will show an automatically updating display of the minutes and seconds since
when. Useful when showing an elapsed time (like an ongoing phone call). The counter can also
be set to count down to when when using setChronometerCountDown(boolean).

Defaults to false if not set.
src/android/Options.java