Fixes for App Store submission warning - "ITMS-90683: Missing Purpose String in Info.plist"

[lawmaestro]

• Added compiler flag GALLERY_USE_LOCATION which is used to partition usage of CoreLocation. If the flag isn't set then the option within Camera to record the location is not available.
• This change forces consumers of the framework to define GALLERY_USE_LOCATION should they wish to compliment photos with location information.
• By introducing this compiler flag we're able to conditionally remove dependencies on CoreLocation when we're not interested in using location information. This in turn avoids the needles requirement to set a NSLocationWhenInUseUsageDescription key in the Apps plist file regardless.
• By having a better way to address this warning this will avoid future App Store rejections when Apple make the inclusion of a NSLocationWhenInUseUsageDescription string mandatory when using CoreLocation.
• Up-versioned to 2.5.0 as this will be a breaking change for consumers using the recordLocation property on Camera.
• Updated README.md

[lawmaestro]

This PR addresses the issue highlighted here

[lawmaestro]

Is there any update on the above? 👆