Fix-ups for prebuilt Chromium

- Make copying far more reliable, even on non-clean builds
- Use $OUT in script in all cases, apparently get_build_var OUT_DIR isn't reliable.
envsetup.sh, please -_-

Change-Id: I27fa9bc7a043c32bcb29e7667e86b40226222a5a
Revert "Use AOSP ringtones, alarms, notifications, and ui"

This reverts commit 51a9305333256c0060773d3e46be032400da3724.

Change-Id: I8e3808af7cb6e582a3f62f02a8b3415051116d74
Merge https://github.com/LiquidSmooth/android_vendor_liquid into lollipop