Add new action to log battery optimizaition mode updated by Turbo.

Bug: 338965652
Test: atest SettingsRoboTests:com.android.settings.fuelgauge.BatteryOptimizeUtilsTest
Change-Id: I80a53d327fee4b0442784e9b20617029f0e63f46
diff --git a/protos/fuelgauge_log.proto b/protos/fuelgauge_log.proto
index 36126a5..4bee75c 100644
--- a/protos/fuelgauge_log.proto
+++ b/protos/fuelgauge_log.proto
@@ -20,6 +20,7 @@
     RESTORE = 4;
     BACKUP = 5;
     FORCE_RESET = 6;
+    EXTERNAL_UPDATE = 7;
   }
 
   optional string package_name = 1;