leave more space for mr1 constants

Change-Id: I237abc2bb204aadeb3148ccdeb82495e317a0dac
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index 2ea5ce4..5a98e5d 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -2260,7 +2260,7 @@
 
     // ------- Begin N Keyboard Shortcuts Helper -----
     // Keyboard Shortcuts Helper is opened/closed.
-    KEYBOARD_SHORTCUTS_HELPER = 460;
+    KEYBOARD_SHORTCUTS_HELPER = 500;
 
     // Add new aosp constants above this line.
     // END OF AOSP CONSTANTS