Misc cleanup on AndroidManifest.xml

- Add a few activities to widget list. These are more commonly
  used settings, so adding them to widget list for easier access.
  - Storage
  - System
  - About phone

- Remove useless intent-filters from AndroidManifest.
  - If the intent-filter is just action MAIN and category DEFAULT, it
   doesn't do anything.

Bug: 74806595
Test: visual
Change-Id: I5d80bc6c88f7bf60adabac872e92b72b341b97e6

src/com/android/settings/shortcut/ShortcutsUpdateTask.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.shortcut;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.ShortcutInfo;
+import android.content.pm.ShortcutManager;
+import android.os.AsyncTask;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ShortcutsUpdateTask extends AsyncTask<Void, Void, Void> {
+
+    private final Context mContext;
+
+    public ShortcutsUpdateTask(Context context) {
+        mContext = context;
+    }
+
+    @Override
+    public Void doInBackground(Void... params) {
+        ShortcutManager sm = mContext.getSystemService(ShortcutManager.class);
+        PackageManager pm = mContext.getPackageManager();
+
+        List<ShortcutInfo> updates = new ArrayList<>();
+        for (ShortcutInfo info : sm.getPinnedShortcuts()) {
+            if (!info.getId().startsWith(CreateShortcut.SHORTCUT_ID_PREFIX)) {
+                continue;
+            }
+            ComponentName cn = ComponentName.unflattenFromString(
+                    info.getId().substring(CreateShortcut.SHORTCUT_ID_PREFIX.length()));
+            ResolveInfo ri = pm.resolveActivity(CreateShortcut.getBaseIntent().setComponent(cn), 0);
+            if (ri == null) {
+                continue;
+            }
+            updates.add(new ShortcutInfo.Builder(mContext, info.getId())
+                    .setShortLabel(ri.loadLabel(pm)).build());
+        }
+        if (!updates.isEmpty()) {
+            sm.updateShortcuts(updates);
+        }
+        return null;
+    }
+}