ENYO-1234: Accessibility: Add "accessibilityLive" to enyo control
ENYO-1234: Accessibility: Add "accessibilityLive" to enyo control

The accessibilityLive is to cover "aria-live" of aria attribute.
In case of dynamic content which updates without a page reload, it needs
to read current value out. If accessibilityLive is set true, screen
reader will read current value of content without any focus whenever it
changed.

https://jira2.lgsvl.com/browse/ENYO-1234
Enyo-DCO-1.1-Signed-off-by: Jaewon Jang <jaewon98.jang@lgepartner.com>

PKRoma/enyo,enyojs/enyo,PKRoma/enyo,enyojs/enyo