Increase the allowed number of probe packets in test to please msan.
Increase the allowed number of probe packets in test to please msan.

This started flaking due to allowing probes to restart if they were aborted due to insufficient packets. This is reasonable behavior.

TBR=pbos@webrtc.org

Review URL: https://codereview.webrtc.org/1701033002 .

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#11638}

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