Add test for https://github.com/ical4j/ical4j/issues/475

package at.bitfire.ical4android

import net.fortuna.ical4j.model.DateTime

import net.fortuna.ical4j.model.Parameter

import net.fortuna.ical4j.model.TemporalAmountAdapter

import net.fortuna.ical4j.model.TimeZoneRegistryFactory

import net.fortuna.ical4j.model.parameter.Email

import org.junit.Assert.assertEquals

import org.junit.Assert.assertNotEquals

        assertEquals("attendee1@example.com", e.attendees.first.getParameter<Email>(Parameter.EMAIL).value)

    }

    @Test

    fun testKarachiTz() {

        // https://github.com/ical4j/ical4j/issues/475

        val tzReg = TimeZoneRegistryFactory.getInstance().createRegistry()

        val karachi = tzReg.getTimeZone("Asia/Karachi")

        val ts1 = 1609945200000

        val dt1 = DateTime(ts1).apply { isUtc = true }

        assertEquals(5, karachi.getOffset(ts1)/3600000)

        val dt2 = DateTime("20210106T200000", karachi)

        assertEquals(1609945200000, dt2.time)

    }

    @Test

    fun testTemporalAmountAdapter_durationToString_DropsMinutes() {

        // https://github.com/ical4j/ical4j/issues/420