Could you pass acute bronchitis on to someone else through kissing or sharing the same air space?

Yes... You could spread the airway infection via droplet exposure. So, if you cough/sneeze and someone else inhales the droplets, they could catch your infection. You could also expose someone via kissing.
No. "acute bronchitis" is due to hyper-reactivity of the bronchi to the irritation of a viral respiratory infection (vri). Less than 20% of population is susceptible to developing frequent cough, increased mucus production, wheezing with vri, those with an asthma-like tendency to over-react to airway irriation, in this case to the irritation of the vri. You can "catch" the vri not the "bronchitis.".