mic: Add comments to C++ example for Grove microphone/sound sensor
mic: Add comments to C++ example for Grove microphone/sound sensor

Signed-off-by: Sarah Knepper <aa6f32c7068de0436ab460eb7d52c137f945f426@intel.com>

srware/upm,noahchense/upm,0xD34D/upm,intel-iot-devkit/upm,g-vidal/upm,nitirohilla/upm,skiselev/upm,Propanu/upm,GSmurf/upm,yoyojacky/upm,whbruce/upm,Vaghesh/upm,jontrulson/upm,srware/upm,Jon-ICS/upm,spitfire88/upm,MakerCollider/upm,stefan-andritoiu/upm,afmckinney/upm,Propanu/upm,ShawnHymel/upm,Jon-ICS/upm,yoyojacky/upm,arfoll/upm,g-vidal/upm,izard/upm,sasmita/upm,stefan-andritoiu/upm,g-vidal/upm,0xD34D/upm,spitfire88/upm,intel-iot-devkit/upm,tripzero/upm,yoyojacky/upm,rafaneri/upm,Propanu/upm,intel-iot-devkit/upm,fieldhawker/upm,stefan-andritoiu/upm,rafaneri/upm,jontrulson/upm,pylbert/upm,whbruce/upm,g-vidal/upm,spitfire88/upm,Propanu/upm,GSmurf/upm,0xD34D/upm,0xD34D/upm,mircea/upm,yoyojacky/upm,nitirohilla/upm,ShawnHymel/upm,afmckinney/upm,ShawnHymel/upm,arfoll/upm,kissbac/upm,Propanu/upm,Vaghesh/upm,stefan-andritoiu/upm,Jon-ICS/upm,g-vidal/upm,kissbac/upm,skiselev/upm,malikabhi05/upm,arfoll/upm,mircea/upm,sasmita/upm,pylbert/upm,malikabhi05/upm,Jon-ICS/upm,spitfire88/upm,stefan-andritoiu/upm,Vaghesh/upm,whbruce/upm,skiselev/upm,andreivasiliu2211/upm,sasmita/upm,kissbac/upm,tylergibson/upm,jontrulson/upm,MakerCollider/upm,skiselev/upm,mircea/upm,pylbert/upm,tripzero/upm,rafaneri/upm,nitirohilla/upm,rafaneri/upm,Propanu/upm,yoyojacky/upm,fieldhawker/upm,MakerCollider/upm,kissbac/upm,skiselev/upm,Vaghesh/upm,mircea/upm,tylergibson/upm,g-vidal/upm,intel-iot-devkit/upm,MakerCollider/upm,andreivasiliu2211/upm,sasmita/upm,afmckinney/upm,pylbert/upm,GSmurf/upm,skiselev/upm,pylbert/upm,andreivasiliu2211/upm,tylergibson/upm,noahchense/upm,sasmita/upm,tylergibson/upm,malikabhi05/upm,arfoll/upm,ShawnHymel/upm,malikabhi05/upm,fieldhawker/upm,afmckinney/upm,srware/upm,malikabhi05/upm,whbruce/upm,tripzero/upm,kissbac/upm,andreivasiliu2211/upm,GSmurf/upm,nitirohilla/upm,izard/upm,fieldhawker/upm,jontrulson/upm,malikabhi05/upm,intel-iot-devkit/upm,Jon-ICS/upm,whbruce/upm,spitfire88/upm,intel-iot-devkit/upm,noahchense/upm,tripzero/upm,mircea/upm,noahchense/upm,tylergibson/upm,rafaneri/upm,MakerCollider/upm,pylbert/upm,tripzero/upm,ShawnHymel/upm,stefan-andritoiu/upm,izard/upm,andreivasiliu2211/upm,nitirohilla/upm,srware/upm,jontrulson/upm,afmckinney/upm,srware/upm,arfoll/upm