Use manual selectors for new APIs (#1606)

This will allow the code to build in older VS versions
Fixes #1589

Author: mattleibow

Xamarin.Essentials/Types/LocationExtensions.ios.tvos.watchos.macos.cs

@@ -8,6 +8,9 @@ namespace Xamarin.Essentials
 {
     public static partial class LocationExtensions
     {
+        [System.Runtime.InteropServices.DllImport(ObjCRuntime.Constants.ObjectiveCLibrary, EntryPoint = "objc_msgSend")]
+        public static extern CLAuthorizationStatus CLAuthorizationStatus_objc_msgSend(IntPtr receiver, IntPtr selector);
+
         internal static Location ToLocation(this CLPlacemark placemark) =>
             new Location
             {
@@ -52,15 +55,19 @@ internal static DateTimeOffset ToDateTime(this NSDate timestamp)
 
         internal static CLAuthorizationStatus GetAuthorizationStatus(this CLLocationManager locationManager)
         {
-#if !__MACOS__ // this is coming in macOS 11
-#if __WATCHOS__
+#if __MACOS__
+            if (DeviceInfo.Version >= new Version(11, 0))
+#elif __WATCHOS__
             if (Platform.HasOSVersion(7, 0))
 #else
             if (Platform.HasOSVersion(14, 0))
 #endif
-                return locationManager.AuthorizationStatus;
+            {
+                // return locationManager.AuthorizationStatus;
 
-#endif
+                var sel = ObjCRuntime.Selector.GetHandle("authorizationStatus");
+                return CLAuthorizationStatus_objc_msgSend(locationManager.Handle, sel);
+            }
 
             return CLLocationManager.Status;
         }