Change latency to int64

Bug: 120161047
Bug: 117060268
Bug: 121072756
Bug: 121071984

Test: Builds
Change-Id: I67a23128a35b76302dbde04b6838420b8731da61
diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index 620c7a8..56ab7e9 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -2429,7 +2429,7 @@
     // specified and supported by the biometric modality, this is from the first ACQUIRED_GOOD to
     // AUTHENTICATED. for setRequireConfirmation(true), this is from PENDING_CONFIRMATION to
     // CONFIRMED.
-    optional int32 latency = 6;
+    optional int64 latency_millis = 6;
 }
 
 /**