Previously deleted almost all the docs (with CL http://ag/1970807),
since those docs are now managed and staged/published from Piper.
However, reference docs are still generated in Gerrit, so it's useful
to be able to stage those docs from a Gerrit client--and that was
broken by my change, since the staging tool expects to see
_book.yaml and _project.yaml in the reference doc directory. So,
restoring those files to re-enable staging of reference docs from
Gerrit.
The publish process is *not* changed: we still grab a good build
from the appropriate Gerrit branch and migrate those files into
Piper, then publish the Piper files.
Test: make ds-docs ; devsite stage --site=android en/reference
Change-Id: I392f1699dc68767d1ac9b7113a149062e5e48ef7
Original Change-Id: I5331cdc968be817ff70ba32dd03fce76493a6ab8
Test: make ds-docs
Android developer docs are now maintained in Piper, go/dac-source
Removing all files from Gerrit, since these files can cause build
errors if they refer to classes that are later removed (whence
bug b/35849713 ).
Gerrit already has readme files in these directories telling people
docs are not maintained here; these readmes will be a lot easier to
spot now.
Ran a doc build with these files deleted, and it seems to work fine,
so submitting this CL *shouldn't* break anything.
Bug: 35849713
Change-Id: Ic74c3f97f9620daf23543930a8b7ed1386f4d172
