HarmonyOS flutter_permission_handler没有适配剪切板权限

请在\entry\src\main下的module.json5文件中申请权限，例如：

"requestPermissions": [
{"name" : "ohos.permission.READ_PASTEBOARD",
"reason": "$string:reason",
"usedScene": {
  "abilities": [
  "FormAbility"
  ],
  "when": "inuse"
}
},
]

在\entry\src\main\resources\base\element下的string.json添加：

{
  "name": "reason",
  "value": "example"
}

在\entry\src\main\resources\en_US\element下的string.json添加：

{
  "name": "reason",
  "value": "example"
}