Roll ICU to 46f53dfc
chromium/src/DEPS already roll in https://chromium-review.googlesource.com/c/chromium/src/+/2235734

Bug: v8:10448
Change-Id: I147189527e57282c6cc7a1e92f832275d5ef55c6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2237353Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68275}