Add HarmonyOS / OpenHarmony Platform Support ？！

[wangxinyu-ww]

Hi, thanks for creating and maintaining this project.

I'm currently using this package in a Flutter project and would like to support HarmonyOS / OpenHarmony as an additional target platform.

At the moment, the package provides support for existing platforms, but there is no HarmonyOS / OpenHarmony implementation.

Would it be possible to add HarmonyOS (OHOS) support to this project?

Use Case

Our Flutter application needs to run on multiple platforms, including:

Android
iOS
HarmonyOS / OpenHarmony

We would like to keep using this package on HarmonyOS instead of maintaining a separate implementation.

Proposed Implementation

Ideally, the Flutter plugin could provide an OHOS implementation similar to the existing Android implementation.

For example:

http_proxy/
├── android/
├── ios/
├── ohos/ <-- HarmonyOS implementation
├── lib/
└── pubspec.yaml

The OHOS implementation could expose the same Dart API as the existing platforms where possible, so that application-level code does not need platform-specific changes.

Question

Do you have any plans to support HarmonyOS / OpenHarmony?

If not, would you be open to accepting a Pull Request that adds OHOS support?

I can help with the HarmonyOS adaptation and testing if needed.

Thanks!