[stable] Cherry-pick DevTools 2.40.3 into the SDK stable branch.

Bug: #59884
Change-Id: I259f06ed2dffe52937007c8251111e502fc974d4
Cherry-pick: flutter/devtools@v2.40.2...2.40.3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/404061
Commit-Queue: Alexander Thomas <[email protected]>
Reviewed-by: Alexander Thomas <[email protected]>
Reviewed-by: Kenzie Davisson <[email protected]>

Author: elliette

CHANGELOG.md

@@ -2,14 +2,16 @@
 
 - Fixes a bug where `HttpServer` responses were not correctly encoded
   if a "Content-Type" header was set (issue [#59719][]).
-
 - Fix `dart format` to parse code at language version 3.6 so that digit
   separators can be parsed correctly (issue [#59815][], dart_style issue
   [#1630][dart_style #1630]).
+- Fixes an issue where the DevTools analytics did not distinguish
+  between new and legacy inspector events (issue [#59884][]).
 
 [#59719]: https://github.com/dart-lang/sdk/issues/59719
 [#59815]: https://github.com/dart-lang/sdk/issues/59815
 [dart_style #1630]: https://github.com/dart-lang/dart_style/issues/1630
+[#59884]: https://github.com/dart-lang/sdk/issues/59884
 
 ## 3.6.1 - 2025-01-08
 

DEPS

@@ -102,7 +102,7 @@ vars = {
   "boringssl_rev": "2db0eb3f96a5756298dcd7f9319e56a98585bd10",
   "browser-compat-data_tag": "ac8cae697014da1ff7124fba33b0b4245cc6cd1b", # v1.0.22
   "cpu_features_rev": "936b9ab5515dead115606559502e3864958f7f6e",
-  "devtools_rev": "711c998bb532d60c992bf48a780ab5c6595447d9",
+  "devtools_rev": "4a1934fa9e7db650312b02b392546995b071d048",
   "icu_rev": "43953f57b037778a1b8005564afabe214834f7bd",
   "jinja2_rev": "2222b31554f03e62600cd7e383376a7c187967a1",
   "libcxx_rev": "44079a4cc04cdeffb9cfe8067bfb3c276fb2bab0",