Add metrics constant for Enterprise Privacy Settings page

This CL adds a metrics constant for the Enterprise Privacy page in
the Settings app.

Test: None
BUG: 32692748
Change-Id: Ifd5429b7db6c2d85858ed4128a5fba4f788911ac
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index 48bc27e..5cf74c7 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -2627,6 +2627,11 @@
     // ACTION: Logs the end to end time taken by all provisioning tasks.
     PROVISIONING_TOTAL_TASK_TIME_MS = 627;
 
+    // OPEN: Settings > Privacy
+    // CATEGORY: SETTINGS
+    // OS: O
+    ENTERPRISE_PRIVACY_SETTINGS = 628;
+
     // ---- End O Constants, all O constants go above this line ----
 
     // Add new aosp constants above this line.