roll: third_party/pigweed f7da1a0..b5431af (2 commits)

b5431af:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/434632 pw_bluetooth_sapphire: use .empty() instead of .size() == 0
92fbccc:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/338952 pw_bluetooth_sapphire: Move Vendor Capabilities opcode usage to Emboss

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: f7da1a01b5be92..b5431afd9ca6d0
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8676161529626691009
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0fa02c4e6c4fd9c7841044a93e8fee4a5e893498
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/436732
diff --git a/third_party/pigweed b/third_party/pigweed
index f7da1a0..b5431af 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f7da1a01b5be9285546a5d12c282c1786f953b15
+Subproject commit b5431afd9ca6d0167461316a3f8aae1f02061d8b