roll: third_party/pigweed pw_bluetooth_proxy: Make AclConnection neither movable nor copyable

This existing move-assignment operator doesn't work anyway, because at
least one of its members (L2capLeUSignalingChannel) is not movable.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/259715
Original-Revision: 91effbebe64f1d0ff0cf081d11a89ec41485779d

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: ebdd5008033640..91effbebe64f1d
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8724524535207696305
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ifbdb742f9f60a6c5b71d710a9c3b0e3ac9f747af
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/263020
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: 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 ebdd500..91effbe 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit ebdd50080336407ff37c329e4d6e77ba4bc5b572
+Subproject commit 91effbebe64f1d0ff0cf081d11a89ec41485779d