ENYO-393: Made locale string comparison case-insensitive.

### Issue
Safari (in iOS and OSX) reports the locale as a lowercase string, but in our sample we are expecting the region identifier to be uppercase, i.e. `en-US`. This is a known issue with Safari that I filed a bug for (#16457887) on 03/28/2014, as this format does not follow the BCP-47 specification, but which has not yet been addressed or resolved. All this results in no locale being currently selected, which causes the picker to have a minimal width until a locale is selected.

### Fix
We perform a case-insensitive comparison on the string locale when setting the current locale in the picker, for the samples.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>