roll: third_party/pigweed 98c880b..c53611c (6 commits)

c53611c:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/270912 pw_string: Add missing dependency
9c7b530:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/270418 pw_bluetooth_proxy: Hold channels lock while using L2capChannel
56fe85e:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/267952 pw_uart_mcuxpresso: Implement FlushOutput for dma_uart_nonblocking
5eec1e4:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/270834 pw_json: Add missing dependency
f0082a3:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/269755 pw_bluetooth_proxy: Allow accessing gatt channel attribute handle
76e4c2b:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/270852 pw_bluetooth_sapphire: Set role for bt-host main thread

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 98c880b6939db1..c53611c82e2e49
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8722006376923886449
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7f21abed2a5b4f9b5bd9fb343c058cd8fa759831
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/kudzu/+/270723
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 98c880b..c53611c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 98c880b6939db11f67fa2d04cf780dc102193eae
+Subproject commit c53611c82e2e49edd5501bd80c8a431b1986f655