I'm going to go out on a limb here and say "no-one". My guess is that rooms are automatically configured and maintained by the ship itself:
The Enterprise has replicators in every set of quarters and access to high-precision transporters.
The Enterprise has a powerful semi-intelligent AI.
We know from the TNG Technical Manual that guest quarters are configured "at short notice" but can only be reconfigured once someone is staying for a longer term.
We know from TNG : Up the Long Ladder that the ship intelligently cleans itself (Riker is confident that it will detect and clean the Bringloidi's dirty sheets and hay, despite these not being part of the ship's usual ephemera):
Worf and Picard EXIT the shot, and Riker walks back to Brenna. She is
fastidiously picking up the sodden blankets.
RIKER : That wasn't necessary. The ship will clean itself.
BRENNA : Well, good for the bloody ship!
If I had to theorise about the fruit, I'd imagine that when you configure a guest room for a human visitor, you simply select a few items from a menu (fruit bowl, flowers, etc) and they're transported and then regularly replenished by the computer whenever the room is left empty.
Additionally, in STD we see cleaning droids floating around the place picking up mess, dusting and wiping. They just pop out of the walls and then disappear discreetly when not needed.
Moving down the canon scale, in the TNG novel Q and A (written by respected and prolific Trek author Keith R.A. DeCandido), we learn that Picard's quarters and bed are all maintained by something he refers to as "automated janitorial systems". No major explanation is given for their workings but apparently they not only clean the floors but also make the beds.
Jean-Luc set down his teacup on the end table next to the bed, then
reached over to cup Beverly’s cheek with his right hand. “I must say,
Beverly, I prefer this method of eating breakfast.”
Reaching over to the tray that sat between them on the bed, Beverly
grabbed another croissant and stuck it in his mouth. “You’re just
saying that because you don’t have to clean the bed.”
They stopped only when the clang of flatware falling to the floor
startled both of them. Peering over the side of the bed, Beverly saw
that the croissant tray and the jam had upended onto the carpet.
She looked at Jean-Luc and grinned. “Oops.”
“Oops, indeed. Suddenly, I’m rather grateful I don’t have to clean the
room myself. Thank heaven for automated janitorial systems.”