[Profiler] NFC: Invert `isUnmapped`
[Profiler] NFC: Invert `isUnmapped`

IMO it's clearer this way.

apple/swift,roambotics/swift,apple/swift,apple/swift,roambotics/swift,roambotics/swift,apple/swift,roambotics/swift,apple/swift,roambotics/swift,apple/swift,roambotics/swift