Revert "Avoid seeding Random with current time in rtp_payload_params"

This reverts commit 9d4cf430f2feae0c86df3aad698ec83d71637580.

Reason for revert: absl::BitGen has issues seeding on Windows10 Chromium render process. https://ci.chromium.org/ui/p/chromium/builders/webrtc.fyi/WebRTC%20Chromium%20FYI%20Win10%20Tester/18543/test-results

Original change's description:
> Avoid seeding Random with current time in rtp_payload_params
>
> Random default constructor now provides a non-deterministic random seed.
>
> This CL was uploaded by an experimental version of git cl split
> (https://crbug.com/389069356).
>
> R=perkj@webrtc.org
>
> Bug: webrtc:42223992, webrtc:441137274
> Change-Id: Icc10c5cd4e83cd46d78c3cd1165c6d5ff69b9e76
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/408740
> Reviewed-by: Per Kjellander <perkj@webrtc.org>
> Auto-Submit: Evan Shrubsole <eshr@webrtc.org>
> Commit-Queue: Per Kjellander <perkj@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#45603}

Bug: webrtc:42223992, webrtc:441137274
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I6a6e1c88d15b324706090b267f7dff64583357ee
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/408901
Commit-Queue: Evan Shrubsole <eshr@webrtc.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#45608}