namespace_browser: devtools: Move many libraries from v.io/x/ref/lib to v.io/x/ref/profiles/internal.
namespace_browser: devtools: Move many libraries from v.io/x/ref/lib to v.io/x/ref/profiles/internal.

We are attempting to minimize our API surface area prior to release.  I also
move a few libraries from v.io/x/ref/lib into v.io/x/ref/testlib to make their
intent more clear.

Change-Id: Ic9801c6139706b74918378df688cd45ce8bb0e9b
MultiPart: 1/4

vanadium/browser,vanadium/browser,vanadium/browser,vanadium/browser