Color: constructor overloads that accept ints

Without these overloads it is possible that integers (expected to be 0-255) are interpreted as floats and clamped between 0 and 1.0 #308, #253

src/Microsoft.Maui.Graphics/Color.cs

@@ -42,6 +42,22 @@ namespace Microsoft.Maui.Graphics
 			Alpha = alpha.Clamp(0, 1);
 		}
 
+		public Color(int red, int green, int blue)
+		{
+			Red = (red / 255f).Clamp(0, 255);
+			Green = (green / 255f).Clamp(0, 255);
+			Blue = (blue / 255f).Clamp(0, 255);
+			Alpha = 1.0f;
+		}
+
+		public Color(int red, int green, int blue, int alpha)
+		{
+			Red = (red / 255f).Clamp(0, 255);
+			Green = (green / 255f).Clamp(0, 255);
+			Blue = (blue / 255f).Clamp(0, 255);
+			Alpha = (alpha / 255f).Clamp(0, 255);
+		}
+
 		public Color(Vector4 color)
 		{
 			Red = color.X.Clamp(0, 1);