From 4fb91d9f1bede8ad49365913804532ca57206455 Mon Sep 17 00:00:00 2001
From: Scott Main
When you instantiate a {@link android.app.backup.SharedPreferencesBackupHelper}, you must the -name of one or more {@link android.content.SharedPreferences} files.
+When you instantiate a {@link android.app.backup.SharedPreferencesBackupHelper}, you must +include the name of one or more {@link android.content.SharedPreferences} files.
For example, to back up a {@link android.content.SharedPreferences} file named "user_preferences", a complete backup agent using {@link android.app.backup.BackupAgentHelper} looks