Currently it's not possible to set the app banner by the project preferences. You have to add it manually in the AndroidManifest.xml.
Moreover, when adding manually, IntelliSense complains "android:banner-Attribute not found".
This is a bug in two parts. :-)
Part 1 is that it seems that Android TV adds some additional attributes to AndroidManifest.xml, e.g. the //application/@android:banner attribute, and these new attributes need to be added to our custom attributes.
Part 2 would be updating the IDEs to surface this information.
monodroid part is done. [master 6604793]
Looks like the "Banner" property was added to the Xamarin.Android side of things in monodroid/master/6604793
Adding Greg and Kzu to see what needs to be done to surface this new property in the Android Manifest Editor in the IDE's.
We should create separate issues for XS and XVS and close this one. We can't track multiple parts of a bug in 3 products with just one bug report
Ide related bugs created
VS - bug #48587
XS - bug #48586