[Multidevice] Clarify SecureChannel connection process logs.

These logs were previously incorrect making it slightly
confusing to read debug logs after the fact. This CL
makes it clear when advertisements are received and
a connection is beginning to be created.

Change-Id: I93ff8b8b415878c499844ae8b3b99d99f9f2a481
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2134770
Commit-Queue: Ryan Hansberry <hansberry@chromium.org>
Auto-Submit: Ryan Hansberry <hansberry@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756381}

chromeos/services/secure_channel/ble_connection_manager_impl.cc

@@ -389,7 +389,7 @@ void BleConnectionManagerImpl::SetAuthenticatingChannel(
   PauseConnectionAttemptsToDevice(remote_device_id);
 
   if (DoesAuthenticatingChannelExist(remote_device_id)) {
-    PA_LOG(ERROR) << "BleConnectionManager::OnReceivedAdvertisement(): A new "
+    PA_LOG(ERROR) << "BleConnectionManager::SetAuthenticatingChannel(): A new "
                   << "channel was created, one already exists for the same "
                   << "remote device ID. ID: "
                   << multidevice::RemoteDeviceRef::TruncateDeviceIdForLogs(
@@ -399,9 +399,9 @@ void BleConnectionManagerImpl::SetAuthenticatingChannel(
 
   SecureChannel* secure_channel_raw = secure_channel.get();
 
-  PA_LOG(INFO) << "BleConnectionManager::OnReceivedAdvertisement(): Connection "
-               << "established; starting authentication process. Remote device "
-               << "ID: "
+  PA_LOG(INFO) << "BleConnectionManager::SetAuthenticatingChannel(): "
+               << "Advertisement received; establishing connection. "
+               << "Remote device ID: "
                << multidevice::RemoteDeviceRef::TruncateDeviceIdForLogs(
                       remote_device_id)
                << ", Connection role: " << connection_role;