fix: [drag] Drag action error.

[GongHeng2017]

1. Drag Action is set up from a third -party application, but the desktop does not perform drag behavior according to the Action execution.
2. Modify the code and identify the source of the DRAG event. If it is a third -party application, the desktop and the cultural tube will not modify this drop action.

Log: fix issue
Bug: https://pms.uniontech.com/bug-view-252557.html

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在所有新增的代码中，都检查了MIME数据是否包含kDFMAppTypeKey，但没有检查是否包含其他必要的MIME类型，可能会导致在不支持所需MIME数据的drop event上跳过处理。
• 新增的代码增加了代码的复杂性，但没有明显的性能问题，但应确保这种检查不会成为性能瓶颈。

合并相似的问题是否建议立即修改:

• 是，建议立即修改以确保代码的健壮性和性能。特别是对于MIME数据的验证，应该考虑全面性，而不仅仅是添加对kDFMAppTypeKey的检查。

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: GongHeng2017, Johnson-zs

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[GongHeng2017]

/merge