Add RunInLocale class to guard locale switching

java/src/com/android/inputmethod/keyboard/KeyboardSet.java

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

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

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

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

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

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