fix: 修复IOS端H5-选中视频-不触发成功/失败回调【3.x】

[zhengyanan1]

这个 PR 做了什么? (简要描述所做更改)
IOS端浏览器环境，Taro.chooseMedia，选中视频时，无法触发成功/失败的回调

这个 PR 是什么类型? (至少选择一个)

• 错误修复(Bugfix) issue: fix #
• 新功能(Feature)
• 代码重构(Refactor)
• TypeScript 类型定义修改(Typings)
• 文档修改(Docs)
• 代码风格更新(Code style update)
• 其他，请描述(Other, please describe):

这个 PR 涉及以下平台:

• 所有小程序
• 微信小程序
• 支付宝小程序
• 百度小程序
• 字节跳动小程序
• QQ 轻应用
• 京东小程序
• 快应用平台（QuickApp）
• Web 平台（H5）
• 移动端（React-Native）
• 鸿蒙（harmony）

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 56.45%. Comparing base (fad526a) to head (eaaa4a1).
Report is 3 commits behind head on 3.x.

Files with missing lines	Patch %	Lines
...ackages/taro-h5/src/api/media/video/chooseMedia.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              3.x   #16942      +/-   ##
==========================================
- Coverage   56.51%   56.45%   -0.06%     
==========================================
  Files         500      500              
  Lines       22765    22801      +36     
  Branches     5652     5666      +14     
==========================================
+ Hits        12866    12873       +7     
- Misses       8693     8718      +25     
- Partials     1206     1210       +4     

Flag	Coverage Δ
taro-cli	75.00% <ø> (+25.78%)	⬆️
taro-runner	54.01% <ø> (ø)
taro-runtime	76.08% <ø> (-3.32%)	⬇️
taro-web	40.47% <0.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...ackages/taro-h5/src/api/media/video/chooseMedia.ts	1.58% <0.00%> (+1.58%)	⬆️

... and 1 file with indirect coverage changes