fix: Learners can't sync courses to calendar on iPhone (#1818)

Source/CalendarManager.swift

@@ -117,13 +117,23 @@ class CalendarManager: NSObject {
 
     func requestAccess(completion: @escaping (Bool, EKAuthorizationStatus, EKAuthorizationStatus) -> ()) {
         let previousStatus = EKEventStore.authorizationStatus(for: .event)
-        eventStore.requestAccess(to: .event) { [weak self] access, _ in
+        let requestHandler: (Bool, Error?) -> Void = { [weak self] access, _ in
             self?.eventStore.reset()
             let currentStatus = EKEventStore.authorizationStatus(for: .event)
             DispatchQueue.main.async {
                 completion(access, previousStatus, currentStatus)
             }
         }
+
+        if #available(iOS 17.0, *) {
+            eventStore.requestFullAccessToEvents { access, error in
+                requestHandler(access, error)
+            }
+        } else {
+            eventStore.requestAccess(to: .event) { access, error in
+                requestHandler(access, error)
+            }
+        }
     }
 
     func addEventsToCalendar(for dateBlocks: [Date : [CourseDateBlock]], completion: @escaping (Bool) -> ()) {

Source/edX-Info.plist

@@ -84,6 +84,8 @@
 	</dict>
 	<key>NSCalendarsUsageDescription</key>
 	<string>edX would like to use your calendar list to subscribe to your personalized edX calendar for this course.</string>
+    <key>NSCalendarsFullAccessUsageDescription</key>
+    <string>edX would like to use your calendar list to subscribe to your personalized edX calendar for this course.</string>
 	<key>NSCameraUsageDescription</key>
 	<string>so you can take a picture for a profile image</string>
 	<key>NSContactsUsageDescription</key>