These methods do not currently work for IPv4 sockets, so they need to be hidden until the underlying kernel code can be made to work properly in a dual-stack environment. Bug: 36073210 Test: compilation Merged-In: Idce367f638a42da374a7f1dc5ebb8931c9555e06 Change-Id: Idce367f638a42da374a7f1dc5ebb8931c9555e06 (cherry picked from commit da18b028f85e9a2c969c636aea6abf7f4bac3922)