Fix what .getPeerHost() test expects

Since .getPeerHost() shouldn't really do a reverse lookup if it only has
an IP address, we directly ask the serverSocket what its address was.
This should be robust if someone in the future were to change
.getLocalSocketAddress() to be based on a name like "localhost" instead
of the current INADDR_ANY logic.

Bug: 27692206
Change-Id: Icc062797f12fbc3a1aba6fb3dc421461a7895f4d
1 file changed