Sync with the private repository

Sync with the private repository

Fix invalid return value for access_action function.
If it returns TRUE, we should convert it to LB_ACCESS_STATUS_DONE
Use the vconf to set the elm_config_access_set

Add unhighlight access event
Convert MARKUP STRING to UTF8 STRING for accessibility (to read it)

Update livebox access status handling codes.
Add more log for debugging for accessibility

Accessibility event feed function is added

Implement the Access chain management code

Change-Id: Ifc4668a1b8386b424535b52b2a087dd22c2a8c3d