fix(ui5-bar): aria label added depending on the "design" property (#3161)

fix(ui5-bar): aria label added depending on the "design" property

Fixes #3020

Author: unazko

packages/fiori/src/Bar.hbs

@@ -1,4 +1,4 @@
-<div class="ui5-bar-root"
+<div class="ui5-bar-root" aria-label="{{accInfo.label}}"
 	role="toolbar">
 	<div class="ui5-bar-content-container ui5-bar-startcontent-container">
 		<slot name="startContent"></slot>

packages/fiori/src/Bar.js

@@ -115,6 +115,12 @@ class Bar extends UI5Element {
 	static get template() {
 		return BarTemplate;
 	}
+
+	get accInfo() {
+		return {
+			"label": this.design,
+		};
+	}
 }
 
 Bar.define();