Set METHOD_ALERT on default event reminders (#493)

import at.bitfire.ical4android.util.DateUtils

import net.fortuna.ical4j.model.Component

import net.fortuna.ical4j.model.component.VAlarm

import net.fortuna.ical4j.model.property.Action

import okhttp3.HttpUrl

import okhttp3.HttpUrl.Companion.toHttpUrlOrNull

import okhttp3.RequestBody

import java.io.Reader

import java.io.StringReader

import java.time.Duration

import java.time.Instant

import java.time.ZonedDateTime

import java.util.*

import java.util.logging.Level

/**

            // set default reminder for non-full-day events, if requested

            val defaultAlarmMinBefore = accountSettings.getDefaultAlarm()

            if (defaultAlarmMinBefore != null && DateUtils.isDateTime(event.dtStart) && event.alarms.isEmpty()) {

                val alarm = VAlarm(Duration.ofMinutes(-defaultAlarmMinBefore.toLong()))

                val alarm = VAlarm(Duration.ofMinutes(-defaultAlarmMinBefore.toLong())).apply {

                    // Sets METHOD_ALERT instead of METHOD_DEFAULT in the calendar provider.

                    // Needed for calendars to actually show a notification.

                    properties += Action.DISPLAY

                }

                Logger.log.log(Level.FINE, "${event.uid}: Adding default alarm", alarm)

                event.alarms += alarm

            }