[third_party/pigweed] Roll 2 commits

af32de572d37fd9 pw_transfer: Tidy up bazel proto imports
1d8f780fb06680a pw_rpc: Add unit tests to the bazel build

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: be3bb88e370f9df..af32de572d37fd9
Roller-URL: https://ci.chromium.org/b/8814337979373075841
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8814337979373075841
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7f4550f5b3894c5e39d6912ad0cc7ddfe8fa42ce
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/94347
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>
diff --git a/third_party/pigweed b/third_party/pigweed
index be3bb88..af32de5 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit be3bb88e370f9df57cba9f4aba67cf4f1a12c096
+Subproject commit af32de572d37fd94cb18695d579c76925b5ce115