Reduce some event log noise:

- Only log battery levels on level changes, not voltage or temp.
- Reduce the text in the start service log to only the suffix
  of the service component, and a uid field.

Change-Id: I6d65e6700e021b3b005dccc90d64f36c1f97137f
diff --git a/services/java/com/android/server/BatteryService.java b/services/java/com/android/server/BatteryService.java
index de58496..2d42cd6 100644
--- a/services/java/com/android/server/BatteryService.java
+++ b/services/java/com/android/server/BatteryService.java
@@ -372,9 +372,9 @@
                         mBatteryStatus, mBatteryHealth, mBatteryPresent ? 1 : 0,
                         mPlugType, mBatteryTechnology);
             }
-            if (mBatteryLevel != mLastBatteryLevel ||
-                    mBatteryVoltage != mLastBatteryVoltage ||
-                    mBatteryTemperature != mLastBatteryTemperature) {
+            if (mBatteryLevel != mLastBatteryLevel) {
+                // Don't do this just from voltage or temperature changes, that is
+                // too noisy.
                 EventLog.writeEvent(EventLogTags.BATTERY_LEVEL,
                         mBatteryLevel, mBatteryVoltage, mBatteryTemperature);
             }