Fix issue #490 - Remove grouped notifications for Android 5 & 6

                .setGroup(account.mastodon_account != null ? account.mastodon_account.username + "@" + account.instance : "" + "@" + account.instance)

                .setGroupSummary(true)

                .build();

        notificationManager.notify(notificationId++, notificationBuilder.build());

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1) {

            notificationManager.notify(0, summaryNotification);

        }

    }

    public static void transfertIfExist(Context context) {

        File dbFile = context.getDatabasePath(OLD_DB_NAME);