We need the attributes to remain public because people might still be linking against them, but we don't want them showing up in the documentation any more. Them showing up in the documentation also had the side effect that it would accidentally mark the parent class of attributes as @removed, which was not intended. Bug: 28663748 Change-Id: I2f6eb09455fddf1086e6b24bc3bea5292e8e32b7