HarmonyOS 如何在无障碍进程显示悬浮窗？

{  
  "module": {  
    "name": "entry",  
    "type": "entry",  
    "description": "$string:module_desc",  
    "mainElement": "EntryAbility",  
    "deviceTypes": [  
      "phone"  
    ],  
    "deliveryWithInstall": true,  
    "installationFree": false,  
    "pages": "$profile:main_pages",  
    "abilities": [  
      {  
        "name": "EntryAbility",  
        "srcEntry": "./ets/entryability/EntryAbility.ets",  
        "description": "$string:EntryAbility_desc",  
        "icon": "$media:layered_image",  
        "label": "$string:EntryAbility_label",  
        "startWindowIcon": "$media:startIcon",  
        "startWindowBackground": "$color:start_window_background",  
        "exported": true,  
        "skills": [  
          {  
            "entities": [  
              "entity.system.home"  
            ],  
            "actions": [  
              "action.system.home"  
            ]  
          }  
        ]  
      }  
    ],  
    "requestPermissions": [  
      {  
        "name": "ohos.permission.SYSTEM_FLOAT_WINDOW",  
      },  
    ],  
    "extensionAbilities": [  
      {  
        "name": "AccessibilityExtAbility",  
        "srcEntry": "./ets/accessibilityextability/AccessibilityExtAbility.ets",  
        "description": "$string:AccessibilityExtAbility_desc",  
        "label": "$string:AccessibilityExtAbility_label",  
        "type": "accessibility",  
        "metadata": [  
          {  
            "name": "ohos.accessibleability",  
            "resource": "$profile:accessibilityextability"  
          }  
        ],  
        "permissions": [  
          "ohos.permission.SYSTEM_FLOAT_WINDOW"  
        ]  
      }  
    ]  
  }  
}