Theoretically some of the molecules in the aromas would indeed be captured by your saliva and nasal mucus. Some of them also would be digestible. In practice, since we would be speaking of milligrams at most, and possibly micrograms, their contribution to your diet would be too small to measure by any everyday standard or method. (In common sense terms, this means: "No")
As for the nourishment you get from the content of your saliva and respiratory mucus, that is more substantial, but it is not net nourishment; every bit of it was provided by your body, and at a slight loss.
