Add @Override for a method that is overriding a new L API

Now all the downstream builds have switched to API Level 21.
Hence putting @Override to new APIs no longer makes javac unhappy.

Change-Id: Ib3324a5d06b17d298beacab8c8802bb14e5be968
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index e59b839..e7a91c5 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -20,6 +20,7 @@
 import static com.android.inputmethod.latin.Constants.ImeOption.NO_MICROPHONE;
 import static com.android.inputmethod.latin.Constants.ImeOption.NO_MICROPHONE_COMPAT;
 
+import android.annotation.TargetApi;
 import android.app.AlertDialog;
 import android.content.BroadcastReceiver;
 import android.content.Context;
@@ -1086,8 +1087,8 @@
         }
     }
 
-    // We cannot mark this method as @Override until new SDK becomes publicly available.
-    // @Override
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @Override
     public void onUpdateCursorAnchorInfo(final CursorAnchorInfo info) {
         if (isFullscreenMode()) {
             return;