Don't allow mojo from chrome/android/feed

Bug: 1108983

Change-Id: I1db76c911fb0ddef7fe42a8d7ee23714bd42319e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2389121Reviewed-by: Justin DeWitt <dewittj@chromium.org>
Commit-Queue: Dan H <harringtond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803880}

chrome/android/feed/DEPS

@@ -8,6 +8,7 @@ include_rules = [
   "+components/feature_engagement",
   "+components/feed",
 
+  "-mojo", # See crbug.com/1108983
   "-content",
   "+content/public/android/java/src/org/chromium/content_public",
 ]