Roll ICU from c9fb4b3a6fb5 to b929596baebf (5 revisions) (#168691)

c9fb4b3a6f..b929596bae

2025-05-05 dloehr@google.com Revert "Suppress
-Wunnecessary-virtual-specifier on Fuchsia"
2025-05-05 dloehr@google.com Cherrypick ICU PR3489 Remove unnecessary
virtual specifiers
2025-04-29 casey.smalley@arm.com Update arm_control_flow_integrity to
use bti+pac-ret
2025-04-22 dayeung@chromium.org Updated tzdb from 2025a to  2025b
2025-04-02 paulkirth@google.com Suppress -Wunnecessary-virtual-specifier
on Fuchsia

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 fuchsia-ui-discuss@google.com,jimgraham@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

DEPS

@@ -264,7 +264,7 @@ deps = {
    Var('chromium_git') + '/external/github.com/google/flatbuffers' + '@' + '0a80646371179f8a7a5c1f42c31ee1d44dcf6709',
 
   'engine/src/flutter/third_party/icu':
-   Var('chromium_git') + '/chromium/deps/icu.git' + '@' + 'c9fb4b3a6fb54aa8c20a03bbcaa0a4a985ffd34b',
+   Var('chromium_git') + '/chromium/deps/icu.git' + '@' + 'b929596baebf0ab4ac7ec07f38365db4c50a559d',
 
    'engine/src/flutter/third_party/gtest-parallel':
    Var('chromium_git') + '/external/github.com/google/gtest-parallel' + '@' + '38191e2733d7cbaeaef6a3f1a942ddeb38a2ad14',