Multi-user battery settings.

Aggregates battery use from other users into one line item.

Change-Id: I811e681891a9ff098491de1e096232f38bf061a9

src/com/android/settings/Settings.java

@@ -105,6 +105,7 @@ public class Settings extends PreferenceActivity
             R.id.display_settings,
             R.id.storage_settings,
             R.id.application_settings,
+            R.id.battery_settings,
             R.id.personal_section,
             R.id.security_settings,
             R.id.user_settings,