Get rid of a race in NsdService in stopResolveService and getAddrInfo

Both requests are made using same id; and there is a chance that
stopResolve() is not fully completed when getAddrInfo() is issued. That
results getAddrInfo() failure, because both are using same requestId.

This change fixes this problem by creating a new unique id to call
getAddrInfo() with.

Bug: 11597153
Change-Id: I56bd78740e8a40bd31c52705dc797486aff53a50