Add an automatic storage management job service.

This service runs once a day when plugged in when the device has
under 15% free space remaining. If the FeatureFactory has a
storage management job, it runs the job to begin to free up space
on the device.

This is a temporary landing place and will be refactored very
quickly out of Settings.

Bug: 28600825

Change-Id: Id2ebb42a333b3b4e3daef4e50cf985fe055b85c7

src/com/android/settings/overlay/FeatureFactoryImpl.java

@@ -33,4 +33,9 @@ public final class FeatureFactoryImpl extends FeatureFactory {
         return null;
     }
 
+    @Override
+    public StorageManagementJobProvider getStorageManagementJobProvider() {
+        return null;
+    }
+
 }