According to E! News that Justin was indeed considered a “high-profile inmate,” but he was not given special treatment while inside.
He was issued a red jumpsuit, indicating his status as high-profile per a color-coding system used by the county, but was not set up for housing (ie. a longer stay) and therefore was not sent to cool his heels in the housing block. Rather, he was kept alone in a holding cell that was equipped with a bunk to sit on, but no mattress.
E! News source was unaware whether Justin was there during prisoner meal time, but if he was, he would have been given something to eat. When he was admitted the local outside temperature was in the low 60s.
Justin was escorted out of the holding cell to attend his bond hearing via satellite, after which he was taken back to the cell to wait until he was bailed out. After his camp had met the $2,500 amount, he was released.