Make AtomicFile a public API.  It's about time!

Change-Id: Ib34e294747405b7ab709cb0bbb2d9a0cc80ce86a
diff --git a/services/java/com/android/server/InputMethodManagerService.java b/services/java/com/android/server/InputMethodManagerService.java
index fdb278d..1e39492 100644
--- a/services/java/com/android/server/InputMethodManagerService.java
+++ b/services/java/com/android/server/InputMethodManagerService.java
@@ -16,7 +16,6 @@
 package com.android.server;
 
 import com.android.internal.content.PackageMonitor;
-import com.android.internal.os.AtomicFile;
 import com.android.internal.os.HandlerCaller;
 import com.android.internal.util.FastXmlSerializer;
 import com.android.internal.view.IInputContext;
@@ -74,6 +73,7 @@
 import android.provider.Settings.SettingNotFoundException;
 import android.text.TextUtils;
 import android.text.style.SuggestionSpan;
+import android.util.AtomicFile;
 import android.util.EventLog;
 import android.util.LruCache;
 import android.util.Pair;