[roll third_party/pigweed] pw_transfer: Add separate session_id to chunk

This partially reverts pigweed:89260 by renaming field number 1 in the
chunk proto back to transfer_id. The session_id field is introduced as
an entirely new field, so that its presence can be used to detect the
protocol version that a transfer is running.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/94063

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: afe420917b3de26..528098d588f3078
Roller-URL: https://ci.chromium.org/b/8813167978591321345
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8813167978591321345
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If4d0beba64b3dd2ac4d654623d171f14a430d6d0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/96021
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
1 file changed