Add OpenHarmony to the platform list(https://wicg.github.io/ua-client-hints/#sec-ch-ua-platform).

[WangAoHui]

In view of the increasing influence and ecosystem construction of OpenHarmony in China, it is recommended that OpenHarmony be added to the platform list. The platform information carried by the UserAgent of the Harmony device is OpenHarmony, for example, Mozilla/5.0 (Phone; OpenHarmony 6.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36 ArkWeb/6.0.0.110 Mobile.

[miketaylr]

Does OpenHarmony (or browsers running on it?) support UA Client Hints?

[WangAoHui]

Sorry to reply so late. Chromium-based browsers can run on OpenHarmony PC devices, which support UA Client Hints.

[WangAoHui]

OpenHarmony's web kernel ArkWeb support for client hints are also under development.