Fix dns searchdomain use in gethostbyname.

Need to load search domain data before we attempt to use it.
This is a cherry pick of an AOSP change c11f6f0f393e472984b5ac2934e2485855a319c9.

bug:6799630

Change-Id: I4ea1131f06ffdf4037fe67f82af5a0349469b609
1 file changed