Elicit ItemsData class and add DiffUtil.Callback

Elicit ItemsData class and add DiffUtil.Callback

In the previous version, when there is a minor change in data, we
will refresh the whole screen(and data) by invoking "recountItems"
and "notifyDataSetChanged", which did lots of unnecessary works.

In this new cl, I elicit ItemsData class, which encapsulates the list
data used in adapter. When data changed, I build another ItemsData and
use the DiffUtil.Callback to calculate diffs between ItemsDatas. In
this way we can only refresh the items that changed in adapter.

Since I cannot find usage of see_all.xml anymore, I delete the relevant
code as well as the resource files.

Bug: 30319913
Test: make RunSettingsRoboTests
Change-Id: I4f753a26f624affea6c6c35d49cfb9c43fb74fe6