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/localepicker/LocaleDragAndDropAdapter.java

@@ -32,7 +32,7 @@ import android.widget.CompoundButton;
 import com.android.internal.app.LocalePicker;
 import com.android.internal.app.LocaleStore;
 import com.android.settings.R;
-import com.android.settings.shortcut.CreateShortcut;
+import com.android.settings.shortcut.ShortcutsUpdateTask;
 
 import java.text.NumberFormat;
 import java.util.ArrayList;
@@ -294,7 +294,7 @@ class LocaleDragAndDropAdapter
 
                 LocalePicker.updateLocales(mLocalesToSetNext);
                 mLocalesSetLast = mLocalesToSetNext;
-                new CreateShortcut.ShortcutsUpdateTask(mContext).execute();
+                new ShortcutsUpdateTask(mContext).execute();
 
                 mLocalesToSetNext = null;