Embed TouchActionsPanel directly into the Android editor UI

editor/editor_node.h

@@ -99,6 +99,11 @@ class ProjectSettingsEditor;
 class SceneImportSettingsDialog;
 class ProjectUpgradeTool;
 
+#ifdef ANDROID_ENABLED
+class HBoxContainer;
+class TouchActionsPanel;
+#endif
+
 struct EditorProgress {
 	String task;
 	bool force_background = false;
@@ -276,6 +281,12 @@ private:
 	VBoxContainer *main_vbox = nullptr;
 	OptionButton *renderer = nullptr;
 
+#ifdef ANDROID_ENABLED
+	HBoxContainer *main_hbox = nullptr; // Only created on Android for TouchActionsPanel.
+	TouchActionsPanel *touch_actions_panel = nullptr;
+	void _touch_actions_panel_mode_changed();
+#endif
+
 	ConfirmationDialog *video_restart_dialog = nullptr;
 
 	int renderer_current = 0;