roll: pigweed pw_uart: Add uart_non_blocking.h API

This CL adds a callback UART API, uart_non_blocking.h, UartNonBlocking.

Original-Bug: 341356437
Original-Bug: 331617095

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/210371
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: f946f6ae13c3bbc2a648b36f9ff55642e9d23b34

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: bbd82e32051480..f946f6ae13c3bb
Roller-URL: https://ci.chromium.org/b/8735703546264100225
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I72c37cc3ff7bf36022092942d7e29acbf57ea63d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/238166
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/MODULE.bazel b/MODULE.bazel
index 6b372ff..e02e943 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -49,8 +49,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-09-26.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8735704116363603825.
-    commit = "bbd82e320514807ff79217f4b6c002fa8eddbbf6",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8735703546264100225.
+    commit = "f946f6ae13c3bbc2a648b36f9ff55642e9d23b34",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
@@ -58,8 +58,8 @@
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-09-26.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8735704116363603825.
-    commit = "bbd82e320514807ff79217f4b6c002fa8eddbbf6",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8735703546264100225.
+    commit = "f946f6ae13c3bbc2a648b36f9ff55642e9d23b34",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )