[NUI] Fix View to use control-accessible State::SENSITIVE

[NUI] Fix View to use control-accessible State::SENSITIVE

In dali-toolkit, control-accessible's State::SENSITIVE has been modified
from Actor::Property::SENSITIVE to IsHittable() && GetTouchRequired().

Unlike control-accessible, NUI View's custom Accessibility state of
Sensitive still refers Actor::Property::SENSITIVE.

So NUI View with ViewAccessibilityMode.Default's Accessibility state of
Sensitive refers IsHittable() && GetTouchRequired().

In contrast, NUI View with ViewAccessibilityMode.Custom's Accessibility
state of Sensitive refers Actor::Property::SENSITIVE.

To make them have same Sensitive value, NUI View's custom Accessibility
state of Sensitive is modified to use the value from control-accessible.