Update database clear & job refresh mechanism for time zone change intent

- Clear database and reset periodic job
- Take a snapshot of current battery usage stats

Bug: 336423923
Test: atest SettingsRoboTests:com.android.settings.fuelgauge.batteryusage
Change-Id: I4aade9db950b508e2190605371f246904f131da3

protos/fuelgauge_log.proto

@@ -45,6 +45,7 @@ message BatteryUsageHistoricalLogEntry {
     FETCH_USAGE_DATA = 4;
     INSERT_USAGE_DATA = 5;
     TIME_UPDATED = 6;
+    TIMEZONE_UPDATED = 7;
   }
 
   optional int64 timestamp = 1;