Back up / restore preferred app configuration

Bug 19848104

Change-Id: I84cdfcc44b48a9732984955d7eedf745b5586bdd

core/java/android/app/backup/BackupTransport.java

@@ -464,7 +464,7 @@ public class BackupTransport {
      * transport level).
      *
      * <p>After this method returns zero, the system will then call
-     * {@link #getNextFullRestorePackage()} to begin the restore process for the next
+     * {@link #nextRestorePackage()} to begin the restore process for the next
      * application, and the sequence begins again.
      *
      * <p>The transport should always close this socket when returning from this method.

core/java/android/app/backup/RecentsBackupHelper.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package android.app.backup;
 
 import android.content.Context;

core/java/android/content/pm/IPackageManager.aidl

@@ -268,6 +268,12 @@ interface IPackageManager {
 
     void clearCrossProfileIntentFilters(int sourceUserId, String ownerPackage);
 
+    /**
+     * Backup/restore support - only the system uid may use these.
+     */
+    byte[] getPreferredActivityBackup(int userId);
+    void restorePreferredActivities(in byte[] backup, int userId);
+
     /**
      * Report the set of 'Home' activity candidates, plus (if any) which of them
      * is the current "always use this one" setting.