Replace useless CharSequence to String

...c/com/android/inputmethod/compat/SuggestionSpanUtils.java

.../android/inputmethod/keyboard/KeyboardActionListener.java

...om/android/inputmethod/keyboard/MoreKeysKeyboardView.java

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

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

...m/android/inputmethod/latin/ContactsBinaryDictionary.java

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

...c/com/android/inputmethod/latin/DictionaryCollection.java

...android/inputmethod/latin/ExpandableBinaryDictionary.java

...c/com/android/inputmethod/latin/ExpandableDictionary.java

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

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

...rc/com/android/inputmethod/latin/RichInputConnection.java

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

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

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

...od/latin/SynchronouslyLoadedContactsBinaryDictionary.java

...method/latin/SynchronouslyLoadedUserBinaryDictionary.java

...c/com/android/inputmethod/latin/UserBinaryDictionary.java

.../com/android/inputmethod/latin/UserHistoryDictionary.java