the phrase "installed in... bedrooms" describes one of two things:
1) the outlets as in "circuits that supply...(outlets installed in ... bedrooms)"
2) the circuits as in "circuits installed in bedrooms that supply outlets"
I believe the first one is what is intended, since the phrase is nearest the outlets in the sentence and not separated by a comma. If the panel had intended #2 that's how they would have said it.
Going with #1, if an outlet is installed in a bedroom on a circuit that previously did not supply bedroom outlets, the circuit now does supply a bedroom outlet and must be AFCI protected.
If we were to go with #2 then any circuit installed in a bedroom wall that supplies an outlet, whether the outlet is in the bedroom or not, would require AFCI protection.
Note that the words "installed for" are not in the code wording, rather "installed in"