Add Low Power Standby support to TrafficController

Bug: 190822356
Test: atest TrafficControllerTest
Change-Id: I84a95081ab6e6a86543fe2cddf0efdab16c90d72
diff --git a/service/native/include/TrafficController.h b/service/native/include/TrafficController.h
index ddcf445..e741dd6 100644
--- a/service/native/include/TrafficController.h
+++ b/service/native/include/TrafficController.h
@@ -99,6 +99,7 @@
     static const char* LOCAL_STANDBY;
     static const char* LOCAL_POWERSAVE;
     static const char* LOCAL_RESTRICTED;
+    static const char* LOCAL_LOW_POWER_STANDBY;
 
   private:
     /*
@@ -160,7 +161,7 @@
      * the map right now:
      * - Entry with UID_RULES_CONFIGURATION_KEY:
      *    Store the configuration for the current uid rules. It indicates the device
-     *    is in doze/powersave/standby/restricted mode.
+     *    is in doze/powersave/standby/restricted/low power standby mode.
      * - Entry with CURRENT_STATS_MAP_CONFIGURATION_KEY:
      *    Stores the current live stats map that kernel program is writing to.
      *    Userspace can do scraping and cleaning job on the other one depending on the