roll: third_party/pigweed b9f1c4d..4bdcd99 (2 commits)

4bdcd99:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/310672 doxygen: Prepare for tab style customizations
ab6bcf5:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/310612 pw_software_update: Correct type annotation

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: b9f1c4d1d046ea..4bdcd99f0c0c75
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8707423430920331857
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5461d8fedc05cc1e3188b356af1f6a1974177537
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/310653
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index b9f1c4d..4bdcd99 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit b9f1c4d1d046eac4f688d00140921c645c018caf
+Subproject commit 4bdcd99f0c0c754c4aba19928a7192a393df7c74