roll: third_party/pigweed pw_bluetooth_proxy: Initial proxy sketch using PacketTask/Proxy

Initial proxy sketch that just forwards packets.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/303472
Copybara-Verified: Copybara Prod <copybara-worker-blackhole@google.com>
Original-Revision: 74ea9605ec4e2cfa738fd831eb5131fe3784bb88

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: f770f6738fe2e1..74ea9605ec4e2c
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8709570245733004337
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I62d76d8b1549011a2fb8704fc18e601998744773
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/304712
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 f770f67..74ea960 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f770f6738fe2e1aeb44750c3c6bff4b1dfd36fa4
+Subproject commit 74ea9605ec4e2cfa738fd831eb5131fe3784bb88