Per discussion with JF and DD, the new holding pen for not-quite-
top-level topics will be a "/topic/" directory, not "/go/". (Currently
the only thing living there is the new "libraries" section.)
Updating redirects and TOCs accordingly. See first comment for
doc stage location.
bug: 28558659
Change-Id: I09201a8334cac70d76559a106a74d5a29fe82128
The /tools/ top-level directory is going away when we move to devsite
(and the Android Studio docs get their own home) so I'm moving the
non-AS docs out of there. Also adding redirects (and fixing redirects
that pointed to the old locations).
For the time being, I'm also adding these libraries in to the
"API Guides" TOC, just so they're discoverable from somewhere; I'm
expecting this to change post-redesign.
See first comment for doc stage location.
bug: 28270787
Change-Id: I07488251384fbd22d2512a797793cf98654f54e7
