I am using unity 2019.2.11
I need our game to run letter boxed at 16:9 on android tablets that are wider than 16:9.
I have tried changing the custom aspect ratio in the unity android player settings to 1.86. These has no effect on wider aspect ratios, they still do not run letter boxed.
If modifying the android manifest XML is the way to do this then I need some clarification on how to do that.
Any help with this would be hugely appreciated.