roll: third_party/pigweed 4a28597..327bbb7 (2 commits)

327bbb7:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/252772 pw_protobuf: Fix EnumStreamFinder read function
571ba51:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/252574 pw_protobuf_compiler: Fix nanopb warning

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 4a28597bf8cc64..327bbb75368c4b
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8729274216033418993
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6e0556a5695e4727c86df06a64dd7150fd6b026e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/252794
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 4a28597..327bbb7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 4a28597bf8cc64f7cfc4cc019ba969bc10747c2b
+Subproject commit 327bbb75368c4b74421eb79f6dbd842e1c9b7423