Issue with rendering spanish unicode literals when weekdays is Mié

Hi Garmin Developers,

I've encountered an issue while working on a watch face project using the Connect IQ SDK. The problem occurs when trying to display the day of the week in Spanish.

Context: I’m using the following code to get the day of the week in Spanish:

var today = Gregorian.info(Time.now(), Time.FORMAT_MEDIUM);
dateDayOfWeekLabel.setText(today.day_of_week.toString());

For "Wednesday" (Miércoles), it should render as "Mié" but instead shows "Mi�".

If you do the following you can also reproduce this issue:

var utf8Array = [77, 105, 195, 169]; // Mié
var utf8String = StringUtil.utf8ArrayToString(utf8Array);

Problem: This issue occurs both in the Garmin simulator and on the device, displaying incorrect characters.

I sow a similar issue in this ticket from 9 years ago: https://forums.garmin.com/developer/connect-iq/f/discussion/1153/unicode-literals-in-monkey-c/1801187#1801187, but I can't see any solution or workaround on this, and I cant make it work.