Add logging constant for settings search result click

Bug: 34975477
Test: Builds
Change-Id: Ie59fb0639c6aa4044ba4fdb0a71dd489bd2d3b68
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index c822652..fc5a9fc 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -3449,6 +3449,9 @@
     // OS: O
     STORAGE_FILES = 841;
 
+    // FIELD - Rank of the clicked Settings search result
+    FIELD_SETTINGS_SERACH_RESULT_RANK = 842;
+
     // ---- End O Constants, all O constants go above this line ----
 
     // Add new aosp constants above this line.