roll: third_party/pigweed 7997384..af8ba6c (2 commits)

af8ba6c:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/314058 pw_protobuf_compiler: Remove deprecated pw_proto_library rule
d6eb5ed:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/309761 pw_bluetooth_sapphire: Create PeriodicAdvertisingSyncManager

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 7997384514813d..af8ba6cd74aae3
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8705875129317851729
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I1c807bb9ddaf718d1335a15178323fc695c5d234
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/315133
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 7997384..af8ba6c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 7997384514813de56c569bf29e40703887a57071
+Subproject commit af8ba6cd74aae37f106b6a8b4b92f7da1ccac7d6