[iOS] Shell/navigation page title view - respect the margin property (#31701)

* [iOS] Shell/NavigationPage TitleView

Replaces the custom CalculateUIEdgeInsets method with an override of AlignmentRectInsets that leverages the IView.Margin property. This ensures the alignment insets reflect the view’s actual margins, allowing developers to align the TitleView directly with the screen edges.

* [iOS] Shell/NavigationPage TitleView

Replaces the custom CalculateUIEdgeInsets method with an override of AlignmentRectInsets that leverages the IView.Margin property. This ensures the alignment insets reflect the view’s actual margins, allowing developers to align the TitleView directly with the screen edges.

Author: kubaflo

src/Controls/src/Core/Compatibility/Handlers/NavigationPage/iOS/NavigationRenderer.cs

@@ -1946,31 +1946,20 @@ public Container(View view, UINavigationBar bar) : base(bar.Bounds)
 				ClipsToBounds = true;
 			}
 
-			UIEdgeInsets CalculateUIEdgeInsets()
+			public override UIEdgeInsets AlignmentRectInsets
 			{
-				var type = UIBarButtonSystemItem.FixedSpace;
-				var spacer = new UIBarButtonItem(type, (_, _) => { });
-				spacer.Width = SystemMargin + (OperatingSystem.IsIOSVersionAtLeast(11) ? 8 : -16);
-
-				nfloat screenWidth = UIScreen.MainScreen.Bounds.Size.Width;
-
-				if (!OperatingSystem.IsIOSVersionAtLeast(11) && screenWidth < 375)
-				{
-					// 3.5 and 4 inch
-					spacer.Width += 8;
-				}
-				else if (screenWidth >= 414)
+				get
 				{
-					// 5.5 inch
-					spacer.Width -= 4;
+					if (_child?.VirtualView is IView view)
+					{
+						var margin = view.Margin;
+						return new UIEdgeInsets(-(nfloat)margin.Top, -(nfloat)margin.Left, -(nfloat)margin.Bottom, -(nfloat)margin.Right);
+					}
+					else
+					{
+						return base.AlignmentRectInsets;
+					}
 				}
-
-				return new UIEdgeInsets(0, spacer.Width, 0, spacer.Width);
-			}
-
-			public override UIEdgeInsets AlignmentRectInsets
-			{
-				get => CalculateUIEdgeInsets();
 			}
 
 			void OnTitleViewParentSet(object sender, EventArgs e)