Update PackageManager.idl comments for async operations

- Simplified documentation comments for RefreshPackageCatalogAsync,
AddPackageCatalogAsync, and RemovePackageCatalogAsync to specify
progress as a percentage (0-100).
- Removed detailed explanation
about progress reporting for "Microsoft.PreIndexed.Package"
Package Catalogs (implementation details).

src/Microsoft.Management.Deployment/PackageManager.idl

@@ -940,10 +940,7 @@ namespace Microsoft.Management.Deployment
         [contract(Microsoft.Management.Deployment.WindowsPackageManagerContract, 12)]
         {
             /// Updates the package catalog.
-            /// The progress value, represented as a double, indicates the percentage of operation completion.
-            /// For "Microsoft.PreIndexed.Package" Package Catalogs, it reflects the progress of downloading and
-            /// installing the index. When there is no meaningful progress to report for other Package Catalogs,
-            /// the progress will be set to 0% at the start and will be updated to 100% upon the operation's completion.
+            /// The progress value, represented as a double, indicates the percentage of update package catalog operation completion.
             /// The progress range is from 0 to 100.
             Windows.Foundation.IAsyncOperationWithProgress<RefreshPackageCatalogResult, Double> RefreshPackageCatalogAsync();
         }
@@ -1500,17 +1497,12 @@ namespace Microsoft.Management.Deployment
         [contract(Microsoft.Management.Deployment.WindowsPackageManagerContract, 12)]
         {
             /// Add a catalog to the Windows Package Catalogs.
-            /// The progress value, represented as a double, indicates the percentage of operation completion.
-            /// For "Microsoft.PreIndexed.Package" Package Catalogs, it reflects the progress of downloading and
-            /// installing the index. When there is no meaningful progress to report for other Package Catalogs,
-            /// the progress will be set to 0% at the start and will be updated to 100% upon the operation's completion.
+            /// The progress value, represented as a double, indicates the percentage of add package catalog operation completion.
             /// The progress range is from 0 to 100.
             Windows.Foundation.IAsyncOperationWithProgress<AddPackageCatalogResult, Double> AddPackageCatalogAsync(AddPackageCatalogOptions options);
 
             /// Unregisters a Package Catalog from the Windows Package Catalogs and eliminates the system artifacts based on the provided options.
-            /// The progress value, represented as a double, indicates the percentage of operation completion.For "Microsoft.PreIndexed.Package"
-            /// Package Catalogs, it reflects the progress of uninstalling the index. When there is no meaningful progress to report for
-            /// other Package Catalogs, the progress will be set to 0% at the start and will be updated to 100% upon the operation's completion.
+            /// The progress value, represented as a double, indicates the percentage of remove package catalog operation completion.
             /// The progress range is from 0 to 100.
             Windows.Foundation.IAsyncOperationWithProgress<RemovePackageCatalogResult, Double> RemovePackageCatalogAsync(RemovePackageCatalogOptions options);
         }