[third_party/pigweed] Roll 2 commits

a1c6bfd62b9dc23 pw_rpc: Do not hold locks while calling user code
3f126ecfc0651e2 Rework PW_RPC Android.bp file

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: d7f76fa1614667c..a1c6bfd62b9dc23
Roller-URL: https://ci.chromium.org/b/8825303854448027713
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8825303854448027713
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id86fa28aeacc591951a3e6e94f523fe36d477cb9
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/78164
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index d7f76fa..a1c6bfd 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit d7f76fa1614667c4cacc1cffa17d86b3e3a5394d
+Subproject commit a1c6bfd62b9dc2343ada32cfc8a9cc724250a863