Fix requested_stats_count value cause no hwcpipe performance counters working

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Description

I found out that all HWCPipe counters not working when I downloaded the newest vulkan samples, and then i found out why and fixed it.

Fixes #<1053>

General Checklist:

Please ensure the following points are checked:

• [ ] My code follows the coding style
• [ ] I have reviewed file licenses
• [ ] I have commented any added functions (in line with Doxygen)
• [ ] I have commented any code that could be hard to understand
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• [ ] My changes do not add any new validation layer errors or warnings
• [ ] I have used existing framework/helper functions where possible
• [ ] My changes do not add any regressions
• [ ] I have tested every sample to ensure everything runs correctly

• [ ] This PR describes the scope and expected impact of the changes I am making

  Note: The Samples CI runs a number of checks including:

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  If this PR contains framework changes:

  • [ ] I did a full batch run using the batch command line argument to make sure all samples still work properly

Sample Checklist

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• [ ] I have tested the sample on at least one compliant Vulkan implementation
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• [ ] Any dependent assets have been merged and published in downstream modules
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