[mdns] Update doc for NsdServiceInfo

This CL updates the javadoc for NsdServiceInfo to make it clearer that a client must contain all the desired address records for the hostname, and all the other registrations must not have any address records for the same hostname.

Bug: 344799768
Test: None

Change-Id: I8eea39adf870a75de23bcafaf8e13d78ee330da4
1 file changed