Add user_education to DEPS after a move.

The user_education feature was recently moved from //chrome/android/ to
//chrome/browser/, see https://crrev.com/c/2422060. Because of the top
level -chrome DEPS rule, all of the places that previously used the
user_education feature are now in violation. Current usages are in the
following directories:

* //chrome/android/feed/
* //chrome/android/java/
* //chrome/android/junit/

Bug: 1127732
Change-Id: I57ab4659d420fa791774269badd370534279e7bd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2441670Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Commit-Queue: Sky Malice <skym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812708}

chrome/android/DEPS

@@ -22,6 +22,7 @@ include_rules = [
   "+chrome/browser/ui/android/favicon/java",
   "+chrome/browser/ui/android/native_page",
   "+chrome/browser/ui/messages/android",
+  "+chrome/browser/user_education",
   "+chrome/browser/util/android/java",
   "+chrome/browser/webauthn/android",
   "+components/browser_ui/android/bottomsheet",