Doesn't the Android emulator run in QEMU? And doesn't qemu actually emulate a Soundcard? So it makes sense that when the emulator starts and boots the kernel in the VM it will probe the devices and act as an audio in&out pass thru, like the virtual SD card, or like the network connection or everything else really...

Coding a special SDK image to adapt to the host system permissions doesnt make any sense. Android will always have access to hardware, and you're testing that it will work on Android, not on an emulator...