android: Move ResourceExtractor from base to ui

This prepares for a future CL that will ensure the set of PAK
files extracted by this class match the UI language used by the
Android framework to display localized strings.

BUG=846633
R=agrieve@chromium.org, astevenson@chromium.org

Change-Id: I316dc53b23f3fc9139af845c1f9fad7e5b4138a6
Reviewed-on: https://chromium-review.googlesource.com/1091310
Reviewed-by: agrieve <agrieve@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: David Turner <digit@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566391}
6 files changed