I have a fresh install of the 3.1 EMDK and Android Studio. I was trying the basic tutorials and samples, and when trying this tutorial (Creating Project using Android Studio), step 5 does not show the Symbol EMDK choices. i have run the Integrator twice and rebooted my PC. This is a Windows 64 install, I have Java jdk1.8.0_05 installed.
EMDK 3.1 (API 16) (Symbol Technologies, Inc.
EMDK 3.1 (API 19) (Symbol Technologies, Inc.)