Click on Certificate, ID & Profiles on left sidebar
Go to App IDs from left sidebar
Click on + icon on top right
Enter the App Name for your reference
Select Explicit App ID and enter you package name which you must have received for android app in the mails from us. ex. mobi.androapp.mysite.c3434 (replace androapp in package name by app, ex. if your Android package name is mobi.androapp.mysite.c3434, enter mobi.app.mysite.c3434 here)