Don't replay channels which aren't logged

If a channel has no data on it, there's no real need to rename it.  And
if we don't rename it but still open a sender, we can end up consuming
senders for the logger.

Change-Id: I93c89bf046e1a8a6cf770e5b80dcceb1414af707
diff --git a/aos/events/logging/logger_test.cc b/aos/events/logging/logger_test.cc
index 56c3bb0..f57f129 100644
--- a/aos/events/logging/logger_test.cc
+++ b/aos/events/logging/logger_test.cc
@@ -30,7 +30,7 @@
 constexpr std::string_view kSingleConfigSha1(
     "bc8c9c2e31589eae6f0e36d766f6a437643e861d9568b7483106841cf7504dea");
 constexpr std::string_view kConfigSha1(
-    "f59be0b208c3feab512abac12720b53166303b382b39806e2beeb46e3b9d2a4a");
+    "47511a1906dbb59cf9f8ad98ad08e568c718a4deb204c8bbce81ff76cef9095c");
 
 class LoggerTest : public ::testing::Test {
  public: