I didn't find Malevolence under ghost's powers in the SRD, though I remember it from 3.5. It works like magic jar so in essence the ghost takes over a body, though without needing a receptacle like a gemstone to hold their own soul between transfers.
Technically, there're no rules within the magic jar spell to let a soul inhabit a vacant body. This is likely due to the standard way the spell works for most users, however. For instance, while using magic jar your spirit is in a gemstone receptacle and your body is comatose. Another person nearby in the area using their own magic jar can't detect your comatose body as a target, because it has no lifeforce. A ghost's malevolence doesn't require them to go into receptacles however, so despite the ability working like magic jar it's not unreasonable to allow a ghost to be able to target any body it can move into, since it actually can find a likely target body.
Magic jar strangely adds the line 'any lifeforce with nowhere to go is treated as slain.' While this doesn't get explained, it could be a way of allowing for certain unusual or highly rare situations where a suitable 'host' body is available and that a bodyless spirit which finds itself suddenly forced out of a host body while out of range of the spell receptacle or its original body might find sanctuary instead of just being slain.
A ghost however, doesn't go into a receptacle and so can pretty much try and target any creature it can move into, so it definitely could attempt to try it on an uninhabited body. I would say it would have to be a usable body, not just a statue or a mannequin, but possibly the uninhabited body of a magic jar user, or a similacrum that hasn't been activated, or possibly even a corpse of someone slain with a death effect (or in some other way that didn't 'damage' the body into death.
If you consider an android body to be a 'body' and not just a construct or otherwise animated object, then I have no problem rules-wise with a ghost taking it over. Again, this shouldn't be easy to find laying around, not like a factory of mannequins or a tomb full of clay soldiers (that would be doable if the ghost was more of an animator spirit than a possessor spirit) and not just any corpse, otherwise it could just keep popping into dead bodies no matter how much the PCs butcher them.
