Orientaion Support

I have an an android app whose UI is support both Mobile Phone and Tablet.

Phone Version only supports Portrait Mode, where Tablet supports both Landscape and Portrait.

In my app, i can know which device it runs on. The challenge is that how to write something in build.setting to control orientation, i.e, if the target device is a tablet, my app can support both landscape and portrait,  but if it’s a phone, then it support only portrait mode.

Anyone has any idea?