roll: third_party/pigweed 3173ab3..68cebbd (5 commits)

68cebbd:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/259660 pw_watch: Alias //pw_watch/py:bazel to //pw_watch:bazel for convenience
6465286:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/259693 pw_watch: Remove deps to enable running watch in other environments
dfc7184:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/259454 pw_bluetooth_sapphire: Register PairingToken during LE pairing
3c65121:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/259356 pw_bluetooth_sapphire: Construct SecurityManager with Peer::WeakPtr
cf38dfa:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/259355 pw_bluetooth_sapphire: Refactor gap::Peer into separate build rule

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 3173ab38ddaa06..68cebbdce8a464
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8726080766211388865
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I27b8fa5cc764a4f6b23997c483dd0144c3b49a0c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/259661
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 3173ab3..68cebbd 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 3173ab38ddaa0617685501aba30c3b367bacc03d
+Subproject commit 68cebbdce8a464df98362b98fc51b71c5390418e