Roll ICU from ff35c4f9df23 to f27805b7d7d8 (1 revision) (flutter#177558)

https://chromium.googlesource.com/chromium/deps/icu.git/+log/ff35c4f9df23..f27805b7d7d8

2025-10-23 ftang@chromium.org [intl] Update filter rule for
android,cast,chromecast,ios

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/icu-sdk-flutter
Please CC chinmaygarde@google.com,fuchsia-ui-discuss@google.com on the
revert to ensure that a human
is aware of the problem.

To file a bug in ICU: https://github.com/unicode-org/icu
To file a bug in Flutter:
https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Author: engine-flutter-autoroll

DEPS

@@ -260,7 +260,7 @@ deps = {
    Var('chromium_git') + '/external/github.com/google/flatbuffers' + '@' + '067bfdbde9b10c1beb5d6b02d67ae9db8b96f736',
 
   'engine/src/flutter/third_party/icu':
-   Var('chromium_git') + '/chromium/deps/icu.git' + '@' + 'ff35c4f9df23800935ff9f34203152c6b3c7881e',
+   Var('chromium_git') + '/chromium/deps/icu.git' + '@' + 'f27805b7d7d8618fa73ce89e9d28e0a8b2216fec',
 
    'engine/src/flutter/third_party/gtest-parallel':
    Var('chromium_git') + '/external/github.com/google/gtest-parallel' + '@' + '38191e2733d7cbaeaef6a3f1a942ddeb38a2ad14',