Show installed extension without reboot (#2372)

Author: EricJohnson327

src/Services/ExtensionService.cs

@@ -114,7 +114,7 @@ private async Task<bool> IsValidDevHomeExtension(Package package)
             if (package.Id.FullName == extension.Package.Id.FullName)
             {
                 var (devHomeProvider, classId) = await GetDevHomeExtensionPropertiesAsync(extension);
-                return devHomeProvider != null && classId.Count == 0;
+                return devHomeProvider != null && classId.Count != 0;
             }
         }