Fixes 1110358 - Enable Location APIs

This just adds the NSLocationWhenInUseUsageDescription key to the Info.plist. This allows the application to use location services, including from `WKWebView`.
When is this message shown to the user? If this is an on-demand message that appears when the site requests location data, we should probably change this to something like "Would you like to share your location data with this site?"