roll: third_party/pigweed ffb5324..bb6bcba (5 commits)

bb6bcba:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/253234 pw_bluetooth: Add AVDTP psm
d3fddeb:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/253232 target: Add missing pw_boot/backend.gni includes
b3d4f6e:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/253233 pw_allocator: Fix first-fit with threshold
c9c4af6:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/253212 pw_protobuf_compiler: Update OWNERS
b8d1cd0:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/252052 pw_build: Document pw_cc_binary

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: ffb53244780463..bb6bcba55e7df3
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8729002988100841201
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Iae1ccd4fb93178aa3908c0ec09474441354633f0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/253252
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.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 ffb5324..bb6bcba 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit ffb532447804634ffa9a97f78886e8422025f9c2
+Subproject commit bb6bcba55e7df334ff5b89d462bfce797130aa1d