fix: cooperation-networkDisPlay service is not available

[yixinshark]

as title

Log: as title
Bug: BUG-294901

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在checkServiceAvailable函数中，QDBusPendingCallWatcher的deleteLater调用应该在watcher对象的所有权被转移给QMetaObject::invokeMethod之前，以避免潜在的内存泄漏。
• checkServiceAvailable函数中的QDBusPendingCallWatcher对象应该使用QScopedPointer或QScopedPointer<QDBusPendingCallWatcher>来管理其生命周期，以确保在异步操作完成后正确删除。
• checkServiceAvailable函数中的QDBusPendingCallWatcher的finished信号处理函数应该检查watcher对象是否已经被删除，以避免在watcher对象被删除后尝试访问它。
• checkServiceAvailable函数中的QDBusPendingCallWatcher的finished信号处理函数应该使用QMetaObject::invokeMethod来确保在主线程中更新m_serviceAvailable状态，以避免潜在的线程安全问题。

是否建议立即修改:
是

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: 18202781743, yixinshark

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[yixinshark]

/forcemerge

[deepin-bot]

This pr force merged! (status: blocked)