App theme change

[sedoLevi609]

"To respond to theme changes on Android your MainActivity class must include the ConfigChanges.UiMode flag in the Activity attribute. .NET MAUI apps created with the Visual Studio project templates automatically include this flag." - this is mentioned in the net maui documentation(theming)(https://learn.microsoft.com/en-us/dotnet/maui/user-interface/system-theme-changes, almost at the end of the documentation). Can you please add support to it (in net maui project)?

[Ismaelfaria]

Cggh