Add metric for oem unlock dialog

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: If75ba92e99cee461c6c7fc5b0d88eb7657e4ee73
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index aa4217c..d7322bd 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -4534,6 +4534,11 @@
     // OS: P
     DIALOG_ENABLE_DEVELOPMENT_OPTIONS = 1158;
 
+    // OPEN: Settings > Developer options > OEM unlocking > Info dialog
+    // CATEGORY: SETTINGS
+    // OS: P
+    DIALOG_ENABLE_OEM_UNLOCKING = 1159;
+
     // Add new aosp constants above this line.
     // END OF AOSP CONSTANTS
   }