Refactor android.backup => android.app.backup

Change-Id: I0b21316ff890d7f3c7d4b82837bb60670724c2e8
diff --git a/services/java/com/android/server/WifiService.java b/services/java/com/android/server/WifiService.java
index 7378333f..8fa862de 100644
--- a/services/java/com/android/server/WifiService.java
+++ b/services/java/com/android/server/WifiService.java
@@ -79,7 +79,7 @@
 import java.net.UnknownHostException;
 
 import com.android.internal.app.IBatteryStats;
-import android.backup.IBackupManager;
+import android.app.backup.IBackupManager;
 import com.android.server.am.BatteryStatsService;
 
 /**