[Request]: Huawei and Honor phones system UI support

### Plugin

share_plus

### Use case

Honor / Huawei: share_plus shows a plain chooser instead of the system OEM share sheet

Device: Honor phone

On Honor (and Huawei) devices, share_plus currently shows a plain Android chooser UI that looks different from the system / OEM share sheet used by native apps.

Workaround that works today

Setting an empty title forces the system OEM sheet:

SharePlus.instance.share(

  ShareParams(

    // ...

    title: Platform.isAndroid ? '' : null, // required on Honor/Huawei to get the proper system sheet

  ),

);

### Proposal

Request
Could share_plus default to the system / OEM share sheet on Honor and Huawei devices (instead of the plain chooser), so we don’t need the title: '' hack?
Thanks!

Start with share_plus's Android handling of SharePlus.instance.share and ShareParams.title, comparing the default path with the documented empty-title workaround on Honor and Huawei devices. Verify the change on an Honor or Huawei phone and confirm the default opens the OEM system sheet without requiring title: ''.

Written by the indexing model from the issue text.