Fix some warnings

...com/android/inputmethod/latin/BinaryDictionaryGetter.java

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

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

...rc/com/android/inputmethod/research/FeedbackActivity.java

...rc/com/android/inputmethod/research/FeedbackFragment.java

java/src/com/android/inputmethod/research/ResearchLog.java

...src/com/android/inputmethod/research/UploaderService.java