Roll third_party/icu/ 4239b1559..bbccc2f6e (5 commits)

https://chromium.googlesource.com/chromium/deps/icu.git/+log/4239b1559d11..bbccc2f6efc1

Created with:
  roll-dep third_party/icu

Change-Id: I81ca8e632226452546f4b19096df34fe58097bfb
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/127534
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Auto-Submit: Andy Phan <andyphan@chromium.org>

DEPS

diff --git a/DEPS b/DEPS
index e2394d9..1b1bf67 100644
--- a/DEPS
+++ b/DEPS
@@ -134,7 +134,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling icu
   # and whatever else without interference from each other.
-  'icu_revision': '4239b1559d11d4fa66c100543eda4161e060311e',
+  'icu_revision': 'bbccc2f6efc1b825de5f2c903c48be685cd0cf22',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling instrumented_lib
   # and whatever else without interference from each other.