Refine optimize page log pattern

- Add timestamp and prefix string
 - Chagne Action.MANUAL to LEAVE for better readability
 screenshot: https://screenshot.googleplex.com/ALTvMaPWVEq8y7c.png

Bug: 192523697
Test: make SettingsRoboTests
Change-Id: I69d1beceb98444d823f6ffc3a015cf61a7d7a66d

src/com/android/settings/fuelgauge/AdvancedPowerUsageDetail.java

@@ -291,7 +291,7 @@ public class AdvancedPowerUsageDetail extends DashboardFragment implements
 
         BatteryHistoricalLogUtil.writeLog(
                 getContext().getApplicationContext(),
-                Action.MANUAL,
+                Action.LEAVE,
                 BatteryHistoricalLogUtil.getPackageNameWithUserId(
                         mBatteryOptimizeUtils.getPackageName(), UserHandle.myUserId()),
                 mLogStringBuilder.toString());