roll: third_party/pigweed f3d2187..b4a75fd (6 commits)

b4a75fd:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/248493 pw_bluetooth_proxy: Remove LDAP from TODOs
7a46cb5:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246736 pw_bluetooth_proxy: Move+copy constructors for channels
6360c3b:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246500 pw_bluetooth: Delete AttNotifyOverAcl
a88df25:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246499 pw_bluetooth_proxy: Increase H4 buffer size
53d5391:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/237263 pw_bluetooth_proxy: Support queueing + L2CAP credits
11ca404:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/249312 docs: Update changelog

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: f3d2187fadc65f..b4a75fd89a70a8
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8731075391226029409
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I2c4f69168a85fc0c17d513dbcd29f594f0f345e0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/249536
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 f3d2187..b4a75fd 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f3d2187fadc65f02f17bc49d1d769601916ffc26
+Subproject commit b4a75fd89a70a872ef842de30f3d75fba9b36ce0