Add logging const for smart setting suggestion enabled/disabled state

Test: builds
Bug: 64121058

Change-Id: I4136d9bfab8c828e85b36ee25421189389a5dddc
Merged-In: I9d1e27082d535da90a5a30f6c2fc9b717c07bf1b
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index eb895de..8156025 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -4305,6 +4305,12 @@
     // OS: O MR
     ACTION_SETTINGS_BLUETOOTH_PAIR_DEVICES_WITHOUT_NAMES = 1096;
 
+    // FIELD - Whether smart suggestion ranking was enabled or not
+    // Type: int encoded boolean
+    // CATEGORY: SETTINGS
+    // OS: O MR
+    FIELD_SETTINGS_SMART_SUGGESTIONS_ENABLED = 1097;
+
     // Add new aosp constants above this line.
     // END OF AOSP CONSTANTS
   }