Roll third_party/icu/ 50ec7b382..bbdc7d893 (4 commits)

https://chromium.googlesource.com/chromium/deps/icu.git/+log/50ec7b3822a9..bbdc7d8936bd

Created with:
  roll-dep third_party/icu

Change-Id: Ifebe877d0861058a499d5199d40ac3b3e2716f60
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/97073
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Auto-Submit: Nigi <nigi@chromium.org>
diff --git a/DEPS b/DEPS
index 8b242be..b31ccc9 100644
--- a/DEPS
+++ b/DEPS
@@ -84,7 +84,7 @@
   # 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': '50ec7b3822a90d73aa761b21fc941b485a1cb9d6',
+  'icu_revision': 'bbdc7d8936bd9b896ff9c9822b697554b73c1c9d',
   # 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.