Fix GetParent() to use unignored parent for blocked node children

Use GetUnignoredParent() in the common FlutterPlatformNodeDelegate::GetParent()
so children of kIgnored (accessibility-blocked) nodes are correctly parented
to the nearest visible ancestor in the AT-SPI tree.

This also resolves the build error in FlutterPlatformNodeDelegateTizen::GetParent()
which was calling the protected GetNativeAccessibleFromId() directly; it now
delegates to the base class implementation instead.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: JSUYA

flutter/shell/platform/common/flutter_platform_node_delegate.cc

@@ -70,12 +70,13 @@ const ui::AXNodeData& FlutterPlatformNodeDelegate::GetData() const {
 }
 
 gfx::NativeViewAccessible FlutterPlatformNodeDelegate::GetParent() {
-  if (!ax_node_->parent()) {
+  auto* unignored_parent = ax_node_->GetUnignoredParent();
+  if (!unignored_parent) {
     return nullptr;
   }
   auto bridge_ptr = bridge_.lock();
   BASE_DCHECK(bridge_ptr);
-  return bridge_ptr->GetNativeAccessibleFromId(ax_node_->parent()->id());
+  return bridge_ptr->GetNativeAccessibleFromId(unignored_parent->id());
 }
 
 gfx::NativeViewAccessible FlutterPlatformNodeDelegate::GetFocus() {

flutter/shell/platform/tizen/flutter_platform_node_delegate_tizen.cc

@@ -139,11 +139,9 @@ gfx::NativeViewAccessible FlutterPlatformNodeDelegateTizen::GetParent() {
   // Walk up through any ignored (e.g. accessibility-blocked) ancestors so that
   // children of blocked nodes are correctly parented to the nearest visible
   // (non-ignored) ancestor in the AT-SPI tree.
-  auto* unignored_parent = GetAXNode()->GetUnignoredParent();
-  if (unignored_parent) {
-    auto bridge_ptr = GetOwnerBridge().lock();
-    BASE_DCHECK(bridge_ptr);
-    return bridge_ptr->GetNativeAccessibleFromId(unignored_parent->id());
+  gfx::NativeViewAccessible parent = FlutterPlatformNodeDelegate::GetParent();
+  if (parent) {
+    return parent;
   }
   return FlutterPlatformAppDelegateTizen::GetInstance()
       .GetWindow()