Fix slightly different values causing some tests to fail

Author: OvrBtn

src/Controls/src/Core/DatePicker/DatePicker.cs

@@ -154,7 +154,7 @@ void ITextElement.OnTextTransformChanged(TextTransform oldValue, TextTransform n
 
 		static DateTime GetDefaultDate()
 		{
-			return DateTimeOffset.Now.DateTime;
+			return DateTimeOffset.Now.DateTime.Date;
 		}
 
 		/// <include file="../../docs/Microsoft.Maui.Controls/DatePicker.xml" path="//Member[@MemberName='UpdateFormsText']/Docs/*" />

src/Core/src/Platform/Android/DatePickerExtensions.cs

@@ -36,7 +36,7 @@ public static void UpdateMinimumDate(this MauiDatePicker platformDatePicker, IDa
 		{
 			if (datePickerDialog != null)
 			{
-				datePickerDialog.DatePicker.MinDate = (long)datePicker.MinimumDate.Subtract(DateTime.MinValue.AddYears(1969)).TotalMilliseconds;
+				datePickerDialog.DatePicker.MinDate = (long)datePicker.MinimumDate.ToUniversalTimeNative().Subtract(DateTime.MinValue.AddYears(1969)).TotalMilliseconds;
 			}
 		}
 
@@ -49,10 +49,24 @@ public static void UpdateMaximumDate(this MauiDatePicker platformDatePicker, IDa
 		{
 			if (datePickerDialog != null)
 			{
-				datePickerDialog.DatePicker.MaxDate = (long)datePicker.MaximumDate.Subtract(DateTime.MinValue.AddYears(1969)).TotalMilliseconds;
+				datePickerDialog.DatePicker.MaxDate = (long)datePicker.MaximumDate.ToUniversalTimeNative().Subtract(DateTime.MinValue.AddYears(1969)).TotalMilliseconds;
 			}
 		}
 
+		static DateTime ToUniversalTimeNative(this DateTime date)
+		{
+			if (date.Kind == DateTimeKind.Utc)
+			{
+				return date;
+			}
+			var timeZone = Java.Util.TimeZone.Default;
+			if (timeZone != null && date != DateTime.MaxValue && date != DateTime.MinValue)
+			{
+				return date.AddHours(-1 * (double)timeZone.RawOffset / 1000 / 60 / 60);
+			}
+			return date.ToUniversalTime();
+		}
+
 		internal static void SetText(this MauiDatePicker platformDatePicker, IDatePicker datePicker)
 		{
 			platformDatePicker.Text = datePicker.Date.ToString(datePicker.Format);