Add Chromium prebuilt and fixup device specific OUT dir [2/2]

Updated code for Lollipop by Omnirom and Paranoid

IMPORTANT: remember to add:
export USE_PREBUILT_CHROMIUM=1
in the build script!

Fixed the webview apk dir and the javalib.jar
huge thanks to Marc @Grondinm

Change-Id: I50779fb67296fdb2a8eb003bd52459c9a7dd5c5f