metricsd: Enable https by default.

libchromeos was updated to set the certificates path correctly, we can
enable https by default.

BUG: 23016355
Change-Id: I88393df4a6892055f4865d86de78ba3a2a5b45e8
diff --git a/metricsd/constants.h b/metricsd/constants.h
index d65e0e0..56dac0d 100644
--- a/metricsd/constants.h
+++ b/metricsd/constants.h
@@ -21,7 +21,7 @@
 static const char kMetricsDirectory[] = "/data/misc/metrics/";
 static const char kMetricsEventsFilePath[] = "/data/misc/metrics/uma-events";
 static const char kMetricsGUIDFilePath[] = "/data/misc/metrics/Sysinfo.GUID";
-static const char kMetricsServer[] = "http://clients4.google.com/uma/v2";
+static const char kMetricsServer[] = "https://clients4.google.com/uma/v2";
 static const char kConsentFilePath[] = "/data/misc/metrics/enabled";
 static const char kDefaultVersion[] = "0.0.0.0";
 }  // namespace metrics