Add enum to log psd bundle creation duration.

Bug:62271803
Test: None. Enum change.
Change-Id: I46921e9330542e981f7983915127832096f6bcd2
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index 63e5cac..f696f94 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -4119,6 +4119,11 @@
     // OS: O DR
     BLUETOOTH_PAIRING = 1018;
 
+    // ACTION: Collect PSD Signals
+    // CATEGORY: SETTINGS
+    // OS: O DR
+    ACTION_PSD_LOADER = 1019;
+
     // Add new aosp constants above this line.
     // END OF AOSP CONSTANTS
   }