roll: third_party/pigweed 840c2f2..9beab24 (6 commits)

9beab24:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/347632 pw_async2: Use more lock annotations in channel.h
b04a327:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/340696 pw_bluetooth_proxy: Add GenericL2capChannel
1cf66b6:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/347236 pw_containers: Add Contains algorithm
039ffea:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/347234 pw_async2: Replace Dispatcher::State with bool
5e618d3:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/346332 pw_web: Fix npm tests after migration
461c729:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/347472 pw_string: Clarify example overloading operator<<

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 840c2f2a01431b..9beab248d92474
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8697558721126895649
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I006ae4364d03ca43f0d252f4601ff4936c573550
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/347772
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 840c2f2..9beab24 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 840c2f2a01431b35dd2e295d79e7905b29f22e4d
+Subproject commit 9beab248d924743dfe95eca11d6f8fd8e02e220c