GitLab

We don't use the android_webview_java target anymore, get rid of it
and the resource_map entries.
Also, get rid of the res_hack folder since we now have a real resources
folder in our source tree.

BUG=None
TEST=compile on android_aosp bot
TBR=miguelg@chromium.org

Review URL: https://codereview.chromium.org/540993002

Cr-Commit-Position: refs/heads/master@{#296695}