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clear the qrCodesList in the QRCodesManager
Currently it is not supported to programmatically manage the cached QR code list in the system. The "qrCodesList" that you are referred from https://github.com/microsoft/MixedReality-QRCode-Sample is locally maintained data structure and data are added when "QRCodeWatcher_Added" event is triggered (changes according to specific events). Removing all data in this list won't have effects on the cached data in the system. Rebooting device or restart driver is the only method. The current QRcode version has limits, and the product team is working on it to improve this feature, but for now all the supported APIs are listed at [QR Code tracking API reference] (https://learn.microsoft.com/en-us/windows/mixed-reality/develop/native/qr-code-tracking-cs-cpp#qr-code-tracking-api-reference).
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