how to change the notification button text to lowercase in android?

Question

Is it possible to change the text style and convert into lowercase? Why does android is not giving such functionality like that?

Code:

builder = new NotificationCompat.Builder(context, id);
            editIntent = new Intent(context, ReminderDetailActivity.class);
            editIntent.putExtra(REMINDER_ID, mReceivedId);
            editIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
            pendingIntent = PendingIntent.getActivity(context, rowId, editIntent, 0);
            builder.setContentTitle(mTitle)

                    .setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher))
                    .setContentTitle(mTitle)
                    .setSmallIcon(R.drawable.ic_alarm_black_24dp)
                    .setSound(mUri)
                    .setAutoCancel(true)
                    .setContentIntent(pendingIntent)
                    .addAction(R.drawable.ic_icon_alarm, context.getString(R.string.pay_now), pendingIntent)
                    .setCategory(NotificationCompat.CATEGORY_REMINDER)
                    .setStyle(new NotificationCompat.BigTextStyle()
                            .bigText("Have you completed your task?"))
                    .setBadgeIconType(NotificationCompat.BADGE_ICON_LARGE)
                    .setPriority(Notification.PRIORITY_HIGH);

            builder.setColor(ContextCompat.getColor(context, R.color.colorPrimary));