Add element call widget type.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/widgets/model/WidgetType.kt

@@ -28,7 +28,8 @@ private val DEFINED_TYPES by lazy {
             WidgetType.StickerPicker,
             WidgetType.Grafana,
             WidgetType.Custom,
-            WidgetType.IntegrationManager
+            WidgetType.IntegrationManager,
+            WidgetType.ElementCall
     )
 }
 
@@ -47,6 +48,7 @@ sealed class WidgetType(open val preferred: String, open val legacy: String = pr
     object Grafana : WidgetType("m.grafana")
     object Custom : WidgetType("m.custom")
     object IntegrationManager : WidgetType("m.integration_manager")
+    object ElementCall : WidgetType("io.element.call")
     data class Fallback(override val preferred: String) : WidgetType(preferred)
 
     fun matches(type: String): Boolean {