[PVR] Address regression due to recent PVR recordings change

[djp952]

Description

This PR addresses a regression caused by PR 17140. Proper initialization of the CPVRRecording class' m_strFileNameAndPath member is bypassed if the Update() method is never called for that instance to reinitialize all member variables.

Motivation and Context

This regression was noted by @ksooo after the PR was merged to master branch, this is an oversight of the original PR testing in which I did not fully verify the state of all member variables before and after the change.

How Has This Been Tested?

Tested on recent Matrix nightly (Jan 8, ref 13b724e), Windows x64 Desktop.

Screenshots (if appropriate):

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Clean up (non-breaking change which removes non-working, unmaintained functionality)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that will cause existing functionality to change)
• Cosmetic change (non-breaking change that doesn't touch code)
• None of the above (please explain below)

Checklist:

• My code follows the Code Guidelines of this project
• My change requires a change to the documentation, either Doxygen or wiki
• I have updated the documentation accordingly
• I have read the Contributing document
• I have added tests to cover my change
• All new and existing tests passed

[ksooo]

Thanks.

[ksooo]

WIN-32 and WIN-64 Jenkins error ([ FAILED ] TestWebServer.CanHeadFile) is unrelated.