I feel silly asking this and even more silly to have this problem. I have a android project that has been executing fine until now.
but a couple of days ago, without
Restart the device
I was experiencing the same problem where my app was always being run in debug mode. Restarting the device did the trick for me.
Ok, I know I am a bit late with this one but I found a solution. It might be not acceptable for someone, but than again, it solved the problem. I just reset my phone to factory settings. After that I was able to install the app without getting "waiting debugger to attach" message always.