Add a MetricsEvent entry for BT forget device confirm dialog

Bug: 37955181
Test: none
Change-Id: Id8513091b49e23c01e00f4a8e0329b82da93e98c
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index 9aa58f5..78d593e 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -4190,6 +4190,12 @@
     // OS: O DR
     FIELD_TIME_ELAPSED_BETWEEN_CHARGE_MS = 1030;
 
+    // OPEN: Settings->Connected Devices->Bluetooth->(click on details link for a paired device)
+    // -> Forget button.
+    // CATEGORY: SETTINGS
+    // OS: O DR
+    DIALOG_BLUETOOTH_PAIRED_DEVICE_FORGET = 1031;
+
     // ---- End O-DR1 Constants, all O-DR1 constants go above this line ----
 
     // Add new aosp constants above this line.