Revert "[Android] Custom back button image color (dotnet#24993)"

This reverts commit 78c337c.

Author: bhavanesh2001

src/Controls/src/Core/Compatibility/Handlers/Shell/Android/ShellToolbarAppearanceTracker.cs

@@ -45,7 +45,6 @@ protected virtual void SetColors(AToolbar toolbar, IShellToolbarTracker toolbarT
 			shellToolbar.BarTextColor = title ?? ShellRenderer.DefaultTitleColor;
 			shellToolbar.BarBackground = new SolidColorBrush(background ?? ShellRenderer.DefaultBackgroundColor);
 			shellToolbar.IconColor = foreground ?? ShellRenderer.DefaultForegroundColor;
-			toolbarTracker.TintColor = foreground ?? ShellRenderer.DefaultForegroundColor;
 		}
 
 		#region IDisposable