Good new, classic Bluetooth feature is now available for ESP32
Get the Arduino IDE library here
I have ported the basic Arduino demo sketch (AndroTest_V20_POSTED.ino) to this super platform
No wiring, no software setup, nothing !!
just upload to ESP32 and enjoy
All in one small board for 5 bucks shipped that's insane 
EDIT
Sketch updated to V1.1
AndroTest_ESP32_V1.1.ino (7.23 KB)