Regional: Default language list can't be removed for carrier

When load language list, getLocaleArray() will return carrier's
overlaid language list from 'R.string.locale_codes' or default
language list to 'localeList'. But the 'Collections.addAll(localeList,
locales)' will add duplicate default list to 'localeList'.

CRs-Fixed: 757884

Change-Id: Ie728900d8d5937f4f9acdcc01fed509a7d2368ad