Add metric for settings new homepage

    Test: Build

Change-Id: I85e4ec0e6d387481a23ca8f354b5d23c6fe8909b
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index a80ea023..7108fae 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -6126,6 +6126,11 @@
     // CATEGORY: NOTIFICATION
     NOTIFICATION_INTERRUPTION = 1501;
 
+    // OPEN: Settings
+    // CATEGORY: SETTINGS
+    // OS: Q
+    SETTINGS_HOMEPAGE = 1502;
+
     // ---- End Q Constants, all Q constants go above this line ----
 
     // Add new aosp constants above this line.