title: Android Studio 3.1: Under Tools menu, Android tool submenu is missing
body: <p>I just upgrade Android Studio from 2.2 to  3.1. I am unable to find Gradle console and DDMS. Under Tools menu, there is no Android submenu that allow me to  get DDMS</p>
  
  <p>I tried solutions that I can find online in stackoverflow</p>
  
  <p>1) File => settings => Menus and Toolbars =>Main menu=>Tools => Android.
     I find under <em>Android</em>, there shows --------, no DDMS tool is listed, and 
     also the Apply button is grayed. </p>
  
  <p>2) Help=> Find Action then type android for search. the screen display android 
     menu, under it  displays AVD manager and SDK manager only.</p>
  
  <p>Anyone gets same problem? anyone find the DDMS and Gradle console in version 3.1?</p>