Add metric for battery tip

When it is triggered, we log the type of battery tip

Bug: 3662211
Test: Build
Change-Id: I3867e3200dab2755ee194a00927a5d172f17303d
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index 72e4c0b..b897c7c 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -5338,6 +5338,11 @@
     // OS: P
     FUELGAUGE_BATTERY_TIP_DIALOG = 1323;
 
+    // OPEN: Settings > Battery > Battery tip
+    // CATEGORY: SETTINGS
+    // OS: P
+    ACTION_BATTERY_TIP_SHOWN = 1324;
+
     // ---- End P Constants, all P constants go above this line ----
     // Add new aosp constants above this line.
     // END OF AOSP CONSTANTS