Considering they sell that investment to the other big companies that put their cameras in their phones… probably good. Do you know otherwise about their financials?
Sony camera hardware has massive marketshare on phones. Sony hasn't particularly invested much in the phone camera hardware space, instead they basically ported the software of their full cameras on it, targeting the professional and prosumer market with features beyond easy good looking pictures for more demanding applications, and seem to be fairly successful for the fairly small niche they're going for.