Use uint64_t instead of long long as API type for consistent reason.

Bug: 74118023
Test: manual
Change-Id: Icd5f506c76d3a008a79cb6c9d2061962ca7fdd40
diff --git a/cmds/statsd/src/metrics/EventMetricProducer.cpp b/cmds/statsd/src/metrics/EventMetricProducer.cpp
index fff91f6..778eb8e 100644
--- a/cmds/statsd/src/metrics/EventMetricProducer.cpp
+++ b/cmds/statsd/src/metrics/EventMetricProducer.cpp
@@ -131,7 +131,7 @@
         return;
     }
 
-    long long wrapperToken =
+    uint64_t wrapperToken =
             mProto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED | FIELD_ID_DATA);
     const bool truncateTimestamp =
         android::util::kNotTruncatingTimestampAtomWhiteList.find(event.GetTagId()) ==
@@ -148,7 +148,7 @@
             (long long)getWallClockNs());
     }
 
-    long long eventToken = mProto->start(FIELD_TYPE_MESSAGE | FIELD_ID_ATOMS);
+    uint64_t eventToken = mProto->start(FIELD_TYPE_MESSAGE | FIELD_ID_ATOMS);
     event.ToProto(*mProto);
     mProto->end(eventToken);
     mProto->end(wrapperToken);