[WebLayer] Remove android_resources target needed for onResourcesLoaded

We can just use org.chromium.base.onResourcesLoaded to get the same
behavior.

Bug: 1105096
Change-Id: I7303f1ba1e6ea741f0b42bb0aa56a4afb0ee663a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2393005


Auto-Submit: Clark DuVall <cduvall@chromium.org>
Commit-Queue: Mohamed Heikal <mheikal@chromium.org>
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804415}