roll: third_party/pigweed aeed7fa..4b9814b (3 commits)

4b9814b:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/299720 pw_bluetooth_proxy: Add H4 packet type for proxy 2.5
d0ed968:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/301372 pw_build: Add Workflows config validator
498c606:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/295212 pw_build: Add Bazel build driver

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: aeed7fa31eaf3e..4b9814b2fe75be
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8710859094484326641
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ib6c53def8d7c364d62e7027f4b01eb34d17146a2
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/301494
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 aeed7fa..4b9814b 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit aeed7fa31eaf3e88f2da0aed6d69e68278b8d0d9
+Subproject commit 4b9814b2fe75be41df75a0779524953e18b2aa1f