Register push notification worker requests

push_notification_work_requests.java

    List < OneTimeWorkRequest > notificationScheduleList = new ArrayList();

    // create list of OneTimeRequests for re triggering notifications every 5 minutes after
    // a new notification is received
    for (int i = 1; i < 3; i++) {
        notificationScheduleList.add(
            new OneTimeWorkRequest.Builder(PushNotificationSchedulerWork.class) // Specify the worker
            .setInitialDelay(30 * i, TimeUnit.MINUTES) // First one at 30th minute, Next at 60th minute
            .addTag("PushNotificationSchedulerWork") // Specify a work tag
            .build()
        );
    }

    // enqueue the notification schedule list as a unique work
    // This will ensure that multiple work are not enqueued for the
    // same job because of ExistingWorkPolicy.REPLACE

    WorkManager.getInstance(context).enqueueUniqueWork(
        "PushNotificationSchedulerWork",
        ExistingWorkPolicy.REPLACE,
        notificationScheduleList
    );