Use case

This change is similar to #82728. We are using a more recent Chromium ICU fork commit.

See for reference: https://chromium.googlesource.com/chromium/deps/icu

Flutter needs to use a reasonably recent version of the ICU library. The Chromium's fork of ICU, which is in use in Flutter as well, has taken in a few updates since the initial 69.1 release. This is a request to bring them in by updating ICU library version in the DEPS file to https://chromium.googlesource.com/chromium/deps/icu/+/2a822c5626ab1ed40366758e4740b4f0ea40237d, which is the current HEAD of the main branch in Chromium's ICU library fork.

Proposal

Update the DEPS file in github.com/flutter/engine to use the commit ID 2a822c5626ab1ed40366758e4740b4f0ea40237d.

This is the same commit ID as used by Chromium M93, making it easier to share the ICU data on systems where it is possible to deduplicate identical libraries, such as Fuchsia.