roll: pigweed, pw_toolchain: pw_console: Default WebHandler.kernel_params to an empty dictionary

Also rename WebHandlers to singular WebHandler

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/223932
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
pigweed, pw_toolchain Rolled-Commits: ee443d56579423e..64fab36c47fbac1
Roller-URL: https://ci.chromium.org/b/8742130170949907505
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I498b09874a00c7aed36594eeddb0070624fc1151
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/223815
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/WORKSPACE b/WORKSPACE
index 0d4321d..0d7bb82 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -84,8 +84,8 @@
     name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-07-17.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8742130567180039937.
-    commit = "ee443d56579423e3b44c51c404db6c8737d44144",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8742130170949907505.
+    commit = "64fab36c47fbac179650a58604466e5cfe290093",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
 )
 
@@ -93,8 +93,8 @@
     name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-07-17.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8742130567180039937.
-    commit = "ee443d56579423e3b44c51c404db6c8737d44144",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8742130170949907505.
+    commit = "64fab36c47fbac179650a58604466e5cfe290093",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
     strip_prefix = "pw_toolchain_bazel",
 )