genlist/gengrid : Add upadating 'focus' state in item realized function.

genlist/gengrid : Add upadating 'focus' state in item realized function.

Summary:
When an item is realized, select/disable/expand signal emission to the view object of an item was handled correctly,but there are no updating code for focus state.

@fix

Test Plan: tested by editing genlist/genlist item edc to react on elm,state,focused and move scroll signals to unrealized/realized item again.

Reviewers: raster, seoz

Reviewed By: seoz

Subscribers: eunue

Differential Revision: https://phab.enlightenment.org/D2024