Added few logging for command notification and DNS-SD updates

Change-Id: I073c46b5ddad450a1d191793195815afa2fc5045
Reviewed-on: https://weave-review.googlesource.com/1300
Reviewed-by: Alex Vakulenko <avakulenko@google.com>
diff --git a/libweave/src/device_registration_info.cc b/libweave/src/device_registration_info.cc
index 5a5fb0d..09c7014 100644
--- a/libweave/src/device_registration_info.cc
+++ b/libweave/src/device_registration_info.cc
@@ -1297,6 +1297,8 @@
   if (!connected_to_cloud_)
     return;
 
+  VLOG(1) << "Command notification received: " << command;
+
   if (!command.empty()) {
     // GCD spec indicates that the command parameter in notification object
     // "may be empty if command size is too big".
diff --git a/libweave/src/privet/privet_manager.cc b/libweave/src/privet/privet_manager.cc
index b2a9882..f204304 100644
--- a/libweave/src/privet/privet_manager.cc
+++ b/libweave/src/privet/privet_manager.cc
@@ -162,6 +162,7 @@
 }
 
 void Manager::OnChanged() {
+  VLOG(1) << "Manager::OnChanged";
   if (publisher_)
     publisher_->Update();
 }
diff --git a/libweave/src/privet/publisher.cc b/libweave/src/privet/publisher.cc
index 37da735..c2f8236 100644
--- a/libweave/src/privet/publisher.cc
+++ b/libweave/src/privet/publisher.cc
@@ -50,7 +50,7 @@
   std::string model_id{cloud_->GetModelId()};
   DCHECK_EQ(model_id.size(), 5U);
 
-  VLOG(1) << "Starting peerd advertising.";
+  VLOG(2) << "DNS-SD update requested";
   const uint16_t port = device_->GetHttpEnpoint().first;
   DCHECK_NE(port, 0);
 
@@ -77,6 +77,7 @@
   auto new_data = std::make_pair(port, txt_record);
   if (published_ == new_data)
     return;
+  VLOG(1) << "Updating DNS-SD";
   published_ = new_data;
   dns_sd_->PublishService(kPrivetServiceType, port, txt_record);
 }
@@ -85,7 +86,7 @@
   if (!published_.first)
     return;
   published_ = {};
-  VLOG(1) << "Stopping service publishing.";
+  VLOG(1) << "Stopping service publishing";
   dns_sd_->StopPublishing(kPrivetServiceType);
 }