Fix dynamic sensor masking bug

[alexander-lam]

Describe the changes in this pull request

This change fixes a bug that occurs when mask sample start time is 0 EpSec and access exists. When this happens, the first interval start time gets removed and errors or incorrect time intervals are generated. This fix mitigates this issue by checking if the condition is met and then preserving the first interval if it is.

Checklist before requesting a review

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• [x] Did you list any dependencies in the readme?
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