Empty out Live Activities files for mac catalyst

* Effectively empty any file referencing ActivityKit in order to support Mac Catalyst builds
* See #1446 for details

Author: nan-li

iOS_SDK/OneSignalSDK/OneSignalLiveActivities/Source/DefaultLiveActivityAttributes.swift

@@ -25,6 +25,10 @@
  THE SOFTWARE.
  */
 
+// Effectively blanks out this file for Mac Catalyst
+#if targetEnvironment(macCatalyst)
+#else
+
 /**
  A default struct conforming to OneSignalLiveActivityAttributes which is registered with OneSignal as a Live Activity
  through `OneSignal.LiveActivities.setupDefault`.  The only action required by the customer app is
@@ -74,3 +78,4 @@ public struct DefaultLiveActivityAttributes: OneSignalLiveActivityAttributes {
     public var data: [String: AnyCodable]
     public var onesignal: OneSignalLiveActivityAttributeData
 }
+#endif

iOS_SDK/OneSignalSDK/OneSignalLiveActivities/Source/OSLiveActivitiesExtension.swift

@@ -25,6 +25,9 @@
  THE SOFTWARE.
  */
 
+// Effectively blanks out this file for Mac Catalyst
+#if targetEnvironment(macCatalyst)
+#else
 import OneSignalOSCore
 import ActivityKit
 
@@ -116,3 +119,4 @@ public class LiveActivitySetupOptions: NSObject {
         self.enablePushToUpdate = enablePushToUpdate
     }
 }
+#endif

iOS_SDK/OneSignalSDK/OneSignalLiveActivities/Source/OneSignalLiveActivitiesManagerImpl.swift

@@ -25,6 +25,9 @@
  THE SOFTWARE.
  */
 
+// Effectively blanks out this file for Mac Catalyst
+#if targetEnvironment(macCatalyst)
+#else
 import OneSignalCore
 import OneSignalOSCore
 import ActivityKit
@@ -238,3 +241,4 @@ public class OneSignalLiveActivitiesManagerImpl: NSObject, OSLiveActivities {
         }
     }
 }
+#endif

iOS_SDK/OneSignalSDK/OneSignalLiveActivities/Source/OneSignalLiveActivityAttributes.swift

@@ -25,6 +25,9 @@
  THE SOFTWARE.
  */
 
+// Effectively blanks out this file for Mac Catalyst
+#if targetEnvironment(macCatalyst)
+#else
 import ActivityKit
 
 /**
@@ -83,3 +86,4 @@ public protocol OneSignalLiveActivityContentState: Decodable, Encodable, Hashabl
 public struct OneSignalLiveActivityContentStateData: Decodable, Encodable, Hashable {
     public var notificationId: String
 }
+#endif