[android][new_arch][fix]: pass timestamp string instead of iso string…

… to date props to fix runtime error on new architecture on android

android/src/main/java/com/henninghall/date_picker/Utils.java

@@ -32,7 +32,13 @@ public static Calendar isoToCalendar(String dateString, TimeZone timeZone)  {
         if(dateString == null) return null;
         try {
             Calendar calendar = Calendar.getInstance(timeZone);
-            calendar.setTime(getIsoUTCFormat().parse(dateString));
+            // Check if the string is a numeric timestamp (positive or negative)
+            if (dateString.matches("-?\\d+")) {  // Matches both positive and negative numbers
+                long timestamp = Long.parseLong(dateString);
+                calendar.setTimeInMillis(timestamp);
+            } else {
+                calendar.setTime(getIsoUTCFormat().parse(dateString));
+            }
             return calendar;
         } catch (ParseException e) {
             e.printStackTrace();

src/DatePickerAndroid.js

@@ -96,7 +96,7 @@ const toIsoWithTimeZoneOffset = (date) => {
   /** @ts-ignore */
   if (!date) return undefined
   /** @ts-ignore */
-  return date.toISOString()
+  return date.getTime().toString()
 }
 
 /** @param {string} timestamp */