Make a method accessible for tests

Tests are using a wrapper method that's going to disappear soon.
The method that becomes package-visible now is destined to be
removed too a little later.

Change-Id: If99b1c77ed52e050b47216cc7afab5f35c4bbb38

java/src/com/android/inputmethod/latin/SuggestedWords.java

@@ -122,7 +122,8 @@ public class SuggestedWords {
             return addWord(word, info);
         }
 
-        private Builder addWord(CharSequence word, SuggestedWordInfo suggestedWordInfo) {
+        /* package for tests */
+        Builder addWord(CharSequence word, SuggestedWordInfo suggestedWordInfo) {
             if (!TextUtils.isEmpty(word)) {
                 mWords.add(word);
                 // It's okay if suggestedWordInfo is null since it's checked where it's used.