[NUI] atspi: use 'class' key for Dali type name (#3009)

This will be used by Aurum(AT-Client) for easy of use.
The Chromium-efl provides attribute 'class' as a key.
This patch supports unified usablilty between different toolkit.

dali-toolkit has same change:
https://review.tizen.org/gerrit/#/c/platform/core/uifw/dali-toolkit/+/257992/

Co-authored-by: Shinwoo Kim <cinoo.kim@samsung.com>
Co-authored-by: Seoyeon2Kim <34738918+Seoyeon2Kim@users.noreply.github.com>

diff --git a/src/Tizen.NUI/src/public/BaseComponents/CustomView.cs b/src/Tizen.NUI/src/public/BaseComponents/CustomView.cs
index dabf1b9..4c8275b 100755 (executable)
--- a/src/Tizen.NUI/src/public/BaseComponents/CustomView.cs
+++ b/src/Tizen.NUI/src/public/BaseComponents/CustomView.cs
@@ -146,7 +146,7 @@ namespace Tizen.NUI.BaseComponents
         public virtual void OnInitialize()
         {
             SetAccessibilityConstructor(Role.Unknown);
-            AppendAccessibilityAttribute("t", this.GetType().Name);
+            AppendAccessibilityAttribute("class", this.GetType().Name);
         }
 
         /// <summary>