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/FeatureFactory.java

@@ -65,6 +65,7 @@ public abstract class FeatureFactory {
      * Return a provider which adds additional deletion services to the Deletion Helper.
      */
     public abstract DeletionHelperFeatureProvider getDeletionHelperFeatureProvider();
+    public abstract StorageManagementJobProvider getStorageManagementJobProvider();
 
     public static final class FactoryNotFoundException extends RuntimeException {
         public FactoryNotFoundException(Throwable throwable) {