Revert "[metrics] Turn on statsd reporting at app startup completion"

This reverts commit 7a0d219c5809276754161d737ca8d0ffc9ad4280.

Bug: 170149255

Reason for revert: Flakes in ThreadLifecycleCallbackRuntimeCallbacksTest.ThreadLifecycleCallbackJava

Change-Id: Iecece1f57eafd49c8e130b07067bfc6571aadae4
diff --git a/runtime/runtime_options.def b/runtime/runtime_options.def
index 3f23bb1..b58d924 100644
--- a/runtime/runtime_options.def
+++ b/runtime/runtime_options.def
@@ -188,7 +188,7 @@
 
 // Metrics configuration settings
 RUNTIME_OPTIONS_KEY (Unit,                WriteMetricsToLog)
-RUNTIME_OPTIONS_KEY (bool,                WriteMetricsToStatsd,           true)
+RUNTIME_OPTIONS_KEY (bool,                WriteMetricsToStatsd,           false)
 RUNTIME_OPTIONS_KEY (std::string,         WriteMetricsToFile)
 RUNTIME_OPTIONS_KEY (Unit,                DisableFinalMetricsReport)
 RUNTIME_OPTIONS_KEY (unsigned int,        MetricsReportingPeriod)