Converted device mode low-level demos to schedulerless.

Demos/Device/LowLevel/AudioInput/AudioInput.c

Demos/Device/LowLevel/AudioInput/AudioInput.h

Demos/Device/LowLevel/AudioInput/makefile

Demos/Device/LowLevel/AudioOutput/AudioOutput.c

Demos/Device/LowLevel/AudioOutput/AudioOutput.h

Demos/Device/LowLevel/AudioOutput/makefile

Demos/Device/LowLevel/CDC/CDC.c

Demos/Device/LowLevel/CDC/CDC.h

Demos/Device/LowLevel/CDC/makefile

Demos/Device/LowLevel/DualCDC/DualCDC.c

Demos/Device/LowLevel/DualCDC/DualCDC.h

Demos/Device/LowLevel/DualCDC/makefile

Demos/Device/LowLevel/GenericHID/GenericHID.c

Demos/Device/LowLevel/GenericHID/GenericHID.h

Demos/Device/LowLevel/GenericHID/makefile

Demos/Device/LowLevel/Joystick/Joystick.c

Demos/Device/LowLevel/Joystick/Joystick.h

Demos/Device/LowLevel/Joystick/makefile

Demos/Device/LowLevel/Keyboard/Keyboard.c

Demos/Device/LowLevel/Keyboard/Keyboard.h