Add more alert details to incidentd header.

+ Add metric_id, dimension, metric_value in the incident report header
  to make it easier to identify an anomaly.
+ In case there is a uid in the dimension, put the its package info in the header too

Test: statsd_test && tested locally with a config

Change-Id: I762a1a4b0563fb3104e0d32b616b4a2367485e48
diff --git a/cmds/statsd/src/anomaly/DurationAnomalyTracker.cpp b/cmds/statsd/src/anomaly/DurationAnomalyTracker.cpp
index 3acfd17..2b56810 100644
--- a/cmds/statsd/src/anomaly/DurationAnomalyTracker.cpp
+++ b/cmds/statsd/src/anomaly/DurationAnomalyTracker.cpp
@@ -65,7 +65,9 @@
 
     // If the alarm is set in the past but hasn't fired yet (due to lag), catch it now.
     if (itr->second != nullptr && timestampNs >= (int64_t)NS_PER_SEC * itr->second->timestampSec) {
-        declareAnomaly(timestampNs, dimensionKey);
+        declareAnomaly(timestampNs, mAlert.metric_id(), dimensionKey,
+                       mAlert.trigger_if_sum_gt() + (timestampNs / NS_PER_SEC) -
+                               itr->second->timestampSec);
     }
     if (mAlarmMonitor != nullptr) {
         mAlarmMonitor->remove(itr->second);
@@ -100,7 +102,9 @@
 
     // Now declare each of these alarms to have fired.
     for (const auto& kv : matchedAlarms) {
-        declareAnomaly(timestampNs, kv.first);
+        declareAnomaly(
+                timestampNs, mAlert.metric_id(), kv.first,
+                mAlert.trigger_if_sum_gt() + (timestampNs / NS_PER_SEC) - kv.second->timestampSec);
         mAlarms.erase(kv.first);
         firedAlarms.erase(kv.second);  // No one else can also own it, so we're done with it.
     }