roll: third_party/pigweed 2 commits

bf88de9f5c04467 pw_system: Reusable DeviceConnection functionality
ada3a6bb4f662b4 pw_web: Add filter field buttons and placeholder

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: db01bc93c1a3857..bf88de9f5c04467
Roller-URL: https://ci.chromium.org/b/8742663833407534769
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I618f38ef8538026948040f80f85ef8bff93e1370
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/222636
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.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 db01bc9..bf88de9 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit db01bc93c1a3857ce6a22034e7cc32e970e12c95
+Subproject commit bf88de9f5c044678d091aa0aa85ad315ce970c16