Default [Q] How to chose default audio source ?

So my question is how to turn off audio source choice, when you have connected a bluetooth device ? Since I added my bluetooth headset to my phone when I pick up from it, my phone lights up the screen and being in my pocket many times it switches to Speaker and drives me crazy.
For those who don't understand which choice menu I mean here's a pic :
Audio Source Choise Menu
DEVICE: HTC One (M7) + Galaxy Gear
ROM : Different day different rom.