message: [dbus] add get/set property logs
diff: @@ -134,6 +134,7 @@ void DBusObject::GetPropertyMethodHandler(DBusRequest &aRequest)
  {
  auto propertyIter = mGetPropertyHandlers.find(interfaceName);
  + otbrLog(OTBR_LOG_INFO, "GetProperty %s.%s", interfaceName.c_str(), propertyName.c_str());
  VerifyOrExit(propertyIter != mGetPropertyHandlers.end(), err = OT_ERROR_NOT_FOUND);
  {
  DBusMessageIter replyIter;
  @@ -209,6 +210,7 @@ void DBusObject::SetPropertyMethodHandler(DBusRequest &aRequest)
  VerifyOrExit(DBusMessageExtract(&iter, propertyName) == OTBR_ERROR_NONE, err = OT_ERROR_PARSE);
  propertyFullPath = interfaceName + "." + propertyName;
  + otbrLog(OTBR_LOG_INFO, "SetProperty %s", propertyFullPath.c_str());
  {
  auto handlerIter = mSetPropertyHandlers.find(propertyFullPath);
  