Implement Alphabetized List for Counties Selection

There are so many counties... and this kinda looks crummy:

So... Why don't we make an alphabetized list that automatically sorts them, and makes 'em all look really nice. Something like one of these resources could give us what we need:

• https://www.npmjs.com/package/react-native-section-alphabet-list
• https://github.com/xVanTuring/Alphabet-List
• https://github.com/ayushnawani/react-native-alphabetflatlist