public List<Integer> getBackableTypes() {
        return Arrays.asList(AppLock.CHANGE_PIN, AppLock.DISABLE_PINLOCK);
    }
Gets the list of {@link AppLock} types that are acceptable to be backed out of using
the device's back button

@return an {@link List<Integer>} of {@link AppLock} types which are backable
lib/src/main/java/com/github/omadahealth/lollipin/lib/managers/AppLockActivity.java