android: Move native library extraction to LibraryLoader

Some constants and methods related to extracted native libraries
from the Chrome APK into a private application data directory
are moved from the ResourceExtractor.java class to LibraryLoader.java
instead.

This is a more logical place, since ResourceExtractor.java is going
to be moved out of //base and into //ui/base/ since it is now mostly
related to UI resources.

See referring bug for more context.

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

Change-Id: I7ff442930ee80dfe9230021ce8e099393d51beca
Reviewed-on: https://chromium-review.googlesource.com/1090926
Commit-Queue: David Turner <digit@chromium.org>
Reviewed-by: agrieve <agrieve@chromium.org>
Reviewed-by: Egor Pasko <pasko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565951}
4 files changed