Return a value for tests instead of saving it

Change-Id: I54fa32b92e89d03a53866bd1c0ee65955dd6b3d3
diff --git a/java/src/com/android/inputmethod/latin/AutoCorrection.java b/java/src/com/android/inputmethod/latin/AutoCorrection.java
index bcb7891..4ddde87 100644
--- a/java/src/com/android/inputmethod/latin/AutoCorrection.java
+++ b/java/src/com/android/inputmethod/latin/AutoCorrection.java
@@ -47,7 +47,7 @@
         return mNormalizedScore;
     }
 
-    public void updateAutoCorrectionStatus(Map<String, Dictionary> dictionaries,
+    public CharSequence updateAutoCorrectionStatus(Map<String, Dictionary> dictionaries,
             WordComposer wordComposer, ArrayList<CharSequence> suggestions, int[] sortedScores,
             CharSequence typedWord, double autoCorrectionThreshold, int correctionMode,
             CharSequence whitelistedWord) {
@@ -63,6 +63,7 @@
             mHasAutoCorrection = true;
             mAutoCorrectionWord = suggestions.get(0);
         }
+        return mAutoCorrectionWord;
     }
 
     public static boolean isValidWord(