Return when invalid config ID was provided through adb command and
change the separator of config_uid and config_id to underscore from dash
to disambiguate negative config ids

Bug: 73896814
Test: statsd_test
Change-Id: Ib0604e9f4c104560d570a64208a9e94d7526f8d6
diff --git a/cmds/statsd/src/guardrail/StatsdStats.cpp b/cmds/statsd/src/guardrail/StatsdStats.cpp
index 66cb1d0..6e45128 100644
--- a/cmds/statsd/src/guardrail/StatsdStats.cpp
+++ b/cmds/statsd/src/guardrail/StatsdStats.cpp
@@ -367,7 +367,7 @@
     fprintf(out, "%lu Config in icebox: \n", (unsigned long)mIceBox.size());
     for (const auto& configStats : mIceBox) {
         fprintf(out,
-                "Config {%d-%lld}: creation=%d, deletion=%d, #metric=%d, #condition=%d, "
+                "Config {%d_%lld}: creation=%d, deletion=%d, #metric=%d, #condition=%d, "
                 "#matcher=%d, #alert=%d,  valid=%d\n",
                 configStats.uid(), (long long)configStats.id(), configStats.creation_time_sec(),
                 configStats.deletion_time_sec(), configStats.metric_count(),
@@ -566,4 +566,4 @@
 
 }  // namespace statsd
 }  // namespace os
-}  // namespace android
\ No newline at end of file
+}  // namespace android