Depend on support lib preferences

Bug: 24576551
Change-Id: Ic6190bacd3f7582c9bbc8de972da4612bd92421e
diff --git a/src/com/android/settings/MasterClearConfirm.java b/src/com/android/settings/MasterClearConfirm.java
index 12a86de..a3caf29 100644
--- a/src/com/android/settings/MasterClearConfirm.java
+++ b/src/com/android/settings/MasterClearConfirm.java
@@ -18,21 +18,20 @@
 
 import android.app.ProgressDialog;
 import android.content.Context;
+import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.os.AsyncTask;
-import android.service.persistentdata.PersistentDataBlockManager;
-
-import com.android.internal.logging.MetricsLogger;
-
-import android.content.Intent;
 import android.os.Bundle;
 import android.os.UserManager;
+import android.service.persistentdata.PersistentDataBlockManager;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.TextView;
 
+import com.android.internal.logging.MetricsLogger;
+
 /**
  * Confirm and execute a reset of the device to a clean "just out of the box"
  * state.  Multiple confirmations are required: first, a general "are you sure