Fix unit test failure

Change-Id: I5a28c6775385ba3b0b7d86c85064fd28f3cbb353
diff --git a/java/src/com/android/inputmethod/latin/settings/AccountsSettingsFragment.java b/java/src/com/android/inputmethod/latin/settings/AccountsSettingsFragment.java
index a02cb55..3288003 100644
--- a/java/src/com/android/inputmethod/latin/settings/AccountsSettingsFragment.java
+++ b/java/src/com/android/inputmethod/latin/settings/AccountsSettingsFragment.java
@@ -28,6 +28,7 @@
 import android.widget.ListView;
 import android.widget.Toast;
 
+import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.SubtypeSwitcher;
 import com.android.inputmethod.latin.accounts.LoginAccountUtils;
@@ -176,6 +177,7 @@
      *
      * Package-private for testing.
      */
+    @UsedForTesting
     AlertDialog createAccountPicker(final String[] accounts,
             final String selectedAccount) {
         if (accounts == null || accounts.length == 0) {