Xmm for me debug works in Android-Studio.
Check my post:
Only issue I had why debug not worked in Android-Studio - like breakpoint didnt stoped because I missed this part:
Run->Edit configuration - select your project → go to tab debugger → set debuger type hybrid and select proper project symbol directory, it will be under this path
proj.android-studio/app/build/intermediates/ndkBuild/debug/obj/local/armeabi-v7a
If you will use Android-Studio DEBUG you will not be able to compile project with console-> compile from Android Studio. I’m afraid as you still new to this 
it will be cahllenge for you to edit gradle;)
Also you would need abiFilters: aremabi if compiling c++ for armeabi