Fix style error

Bug: 118783261
Test: Manually tested by running: adb shell cmd stats print-logs,
    adb logcat | grep statsd | grep \(77\)

Change-Id: I149006f9e625e609ffe3bbd713a2d30a2c69dafe
diff --git a/cmds/statsd/src/atoms.proto b/cmds/statsd/src/atoms.proto
index f58caff..4aa60b5 100644
--- a/cmds/statsd/src/atoms.proto
+++ b/cmds/statsd/src/atoms.proto
@@ -1222,7 +1222,7 @@
         STATE_CONNECTED = 1;
     }
     optional State state = 6;
-    optional int64 last_connect_duration_ms = 7;
+    optional int64 last_connect_duration_millis = 7;
 }
 
 
@@ -3586,4 +3586,4 @@
  */
 message DocsUIInvalidScopedAccessRequestReported {
     optional android.stats.docsui.InvalidScopedAccess type = 1;
-}
\ No newline at end of file
+}