config: Added two APIs to enable/disable focus auto scroll bring in feature.

config: Added two APIs to enable/disable focus auto scroll bring in feature.

Summary:
 Summary:
    - APIs
      - elm_config_focus_auto_scroll_bring_in_enabled_set
      - elm_config_focus_auto_scroll_bring_in_enabled_get
    - list/genlist/toolbar/gengrid: Using this feature for scrolling for focus movement.
    - Added test case in "List Focus", "Genlist Focus", "Toolbar Focus" and "Gengrid Focus"

    @feature

Test Plan: elementary_test->"List Focus", "Genlist Focus", "Toolbar Focus" & "Gengrid Focus".

Reviewers: raster, seoz

CC: seoz
Differential Revision: https://phab.enlightenment.org/D799