Add IconCache support for deep shortcuts, loads deepshortcut on

background thread.  Added a feature flag to toggle on/off this
feature.

Bug: 140242324
Test:
  1. (Custom Shortcut) Long click on google maps -> widgets -> drag
     driving mode to workspace.

  2. Open chrome -> add to home screen -> add -> add automatically.

  3. InstallShortcutReceiver
     In Launcher.completeAddShortcut, commend out the code that
     calls PinRequestHelper.createWorkspaceItemFromPinItemRequest,
     then open chrome -> add to home screen -> add -> add
     automatically.

  4. ShortcutDragPreviewProvider
     qdb -> long press on suggested app that has deep shortcut
     -> drag to workspace.

Change-Id: If7babe4eddf5434909bf686b4e9bde15e444d9fd

src/com/android/launcher3/util/ShortcutUtil.java

@@ -15,10 +15,19 @@
  */
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
+
+import android.content.Context;
+import android.content.pm.ShortcutInfo;
+
+import androidx.annotation.NonNull;
+
 import com.android.launcher3.ItemInfo;
+import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.WorkspaceItemInfo;
+import com.android.launcher3.icons.LauncherIcons;
 import com.android.launcher3.model.WidgetsModel;
 import com.android.launcher3.shortcuts.ShortcutKey;
 
@@ -61,6 +70,21 @@ public class ShortcutUtil {
                 && info instanceof WorkspaceItemInfo;
     }
 
+    /**
+     * Fetch the shortcut icon in background, then update the UI.
+     */
+    public static void fetchAndUpdateShortcutIconAsync(
+            @NonNull Context context, @NonNull WorkspaceItemInfo info, @NonNull ShortcutInfo si,
+            boolean badged) {
+        MODEL_EXECUTOR.execute(() -> {
+            try (LauncherIcons li = LauncherIcons.obtain(context)) {
+                info.bitmap = li.createShortcutIcon(si, badged, null);
+                LauncherAppState.getInstance(context).getModel()
+                        .updateAndBindWorkspaceItem(info, si);
+            }
+        });
+    }
+
     private static boolean isActive(ItemInfo info) {
         boolean isLoading = info instanceof WorkspaceItemInfo
                 && ((WorkspaceItemInfo) info).hasPromiseIconUi();