Primarily adds designed layouts for permission gates (also referred to as permissions priming).
* moved permission gate business logic into a container
* use react-native-permissions exclusively
* Show PermissionGate as a modal
* Basic unit tests for PermissionGate
* Consistent content width on tablet, other minor style changes
* Allow PermissionGate to be used outside of nav hierarchy
* Use user location on Explore after getting permission
* Remove redundant 'always' location perm in ios
* Isolate current location button in the Map component, which uses location fetching functionality from react-native-maps instead of our own
* Updated cocoapods; matched INatIcon.ttf to sha1 hashes
* Obscuration cell and accuracy circle on ObsDetail map
* DetailsMap view
* Copy and share location from DetailsMap
* Patched react-native-maps to address bug with showsUserLocation
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Co-authored-by: Ken-ichi Ueda <kenichi.ueda@gmail.com>