I've tried 2 ways:
1.
Add Item > Add Application
Type: Mobile
Purpose: Ready To Use
SDK: Android
URL: ? I don't know what to put for this. It is an Android app on my computer. It does not have a url.
2.
Add Item > From My computer
For File, I click Choose File and select the apk file of the app
I get the error:
This file type is not supported.
If not apk, then what?