Add app entities widget for recently opened apps

If there is no recently opened app should be shown,
just show up an "All apps" preference.

If there are some recently opened apps, we show up
result with app entites controller.

- Clean up some useless ui. (category)
- User BasePreferenceController
- Modify test cases.

Test: robotest, visual
Change-Id: I411f61ed32eaaed97921941fd5026f1d65308d00
Fixes: 123538183