[Android] The first step to fix the resource id generation for core libr...

...ary.

Currently the resource ids for org.chromium.ui and org.chromium.content
are not generated so the web app will crash when running. Because
it can't get the resource id.
This patch is the first step to copy necessary resources to xwalk
core library. The next step is to generate the correct R.java.

BUG=#862