[roll third_party/pigweed] pw_bluetooth: Use $size_in_bits instead of hardcoding size

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/176573

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 922bbb9c684f29f..6e3b329a579ccdd
Roller-URL: https://ci.chromium.org/b/8766934635575483969
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6f5d3dcca32f137aa3c36b767b07b312ee84bc85
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/176627
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.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 922bbb9..6e3b329 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 922bbb9c684f29f615c9ec46108181a5115997fd
+Subproject commit 6e3b329a579ccddf532205c6671169c304dc6224