roll: third_party/pigweed: pw_transfer: Always set protocol version in final chunk

This ensures that a protocol version is always set when a transfer sends
its final chunk, even if one has not been yet configured through the
handshake. In these cases, uses the client's desired protocol version.

Additionally, fixes a bug where a chunk received in a COMPLETED state
went through a protocol version check in receive transfers, overriding
the original status with INTERNAL. Transmit transfers were already
correctly handling this by avoiding the protocol version check in this
state.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/229289
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https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: c9d5bef2f82612f..3d7d7635281155e
Roller-URL: https://ci.chromium.org/b/8739616832892460033
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Iec889348e6a442adbd60523a0dc5cff65b8921fd
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/229612
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
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diff --git a/third_party/pigweed b/third_party/pigweed
index c9d5bef..3d7d763 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c9d5bef2f82612fa8d4be0d53b614bbc02bab62b
+Subproject commit 3d7d7635281155e7774e5f5cbe1c01d567e47995