xr-frame, 我试了modes:Plane;camera:Front，结果调用的还是后置摄像头。在我们实际使用场景中，有需要使用前置摄像头，能否在Plane模式下支持前置摄像头？谢谢
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- Inquiry Delivery Mode: 小商店/Development/Extended/Trading component/Standard Trading Components and Open Interfaces/Server interface/Distribution mode interface/Inquiry Delivery Mode
- Set up delivery mode: 小商店/Development/Extended/Trading component/Standard Trading Components and Open Interfaces/Server interface/Distribution mode interface/Set up delivery mode
- Interface call request specification: 小商店/Development/Extended/Trading component/Standard Trading Components and Open Interfaces/Server interface/Distribution mode interface/Inquiry Delivery Mode
- Request Parameter Sample: 小商店/Development/Extended/Trading component/Standard Trading Components and Open Interfaces/Server interface/Distribution mode interface/Inquiry Delivery Mode
- Return Package Example: 小商店/Development/Extended/Trading component/Standard Trading Components and Open Interfaces/Server interface/Distribution mode interface/Inquiry Delivery Mode
请具体描述问题出现的流程，并提供能复现问题的简单代码片段（https://developers.weixin.qq.com/miniprogram/dev/devtools/minicode.html）。