ot::Dns::Client::BrowseResponse::GetServiceInfo() const method

Gets info for a service instance from a DNS browse (service instance enumeration) response. MUST only be used from `BrowseCallback`. A browse DNS response should include the SRV, TXT, and AAAA records for the service instances that are enumerated (note that it is a SHOULD and not a MUST requirement). This method tries to retrieve this info for a given service instance. - If no matching SRV record is found, `kErrorNotFound` is returned. - If a matching SRV record is found, @p aServiceInfo is updated returning `kErrorNone`. - If no matching TXT record is found, `mTxtDataSize` in @p aServiceInfo is set to zero. - If no matching AAAA record is found, `mHostAddress is set to all zero or unspecified address. - If there are multiple AAAA records for the host name `mHostAddress` is set to the first one. The other addresses can be retrieved using `GetHostAddress()` method.