roll: third_party/pigweed 69cfc37..a31cc49 (5 commits)

a31cc49:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/315392 pw_kernel: list: Use immutable references
d3d6785:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/307964 pw_presubmit: Avoid using PW_PROJECT_ROOT in presubmit_context.py
21d5810:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/315192 third_party_fuschia: Fix dependencies
2a9a8b2:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/314393 pw_kernel: list: Refactor for safety and binary size
e88938e:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/311258 pw_bluetooth_sapphire: Support PA synchronization in Adapter

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 69cfc37177583c..a31cc49b280ae4
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8705796466366987793
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id7118c920d231cb9cd0acde2335741393de1740a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/315632
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.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 69cfc37..a31cc49 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 69cfc37177583c5c6ab4efbc7863d9682b692b12
+Subproject commit a31cc49b280ae4409f4a5ed2ebd98109d9d4ec01