roll: third_party/pigweed 4a2ab50..b2ed425 (5 commits)

b2ed425:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/272934 third_party/freertos: Change stack size type in support hooks
0cd6831:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/266273 pw_flatbuffers: Flatbuffers cmake support
7d1b8cd:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/273453 Revert "pw_malloc: Synchronize access to the system metrics"
a131637:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/273454 Revert "pw_malloc: Rename GetSystemAllocator to CreateSystemAllocator"
8af514d:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/273333 pw_bluetooth_sapphire: Fix uninitialized variable in bt::Random()

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 4a2ab500597e72..b2ed42565a79ce
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8721100159159858737
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If2aaa43d5d23823fd90ef26ed807fef8f921bcb1
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/273478
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 4a2ab50..b2ed425 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 4a2ab500597e72d1d87777be23a644b9b343a702
+Subproject commit b2ed42565a79ce4be4eaaaaa4024f3dcd84e7b00