With the transition from N Preview to actual Nougat Release, this CL moves
the high-level overview files from the preview directory into the
about/versions/ directory, under which an archive of current and previous
Android versions' changes resides.
Change-Id: I42373b0302e953f8166c62e7c8422f2481322240
For Android N release, migrating and updating Scoped Directory Access
docs into regular DAC docs. Updated TOC and added redirect.
Removed preview/features doc. Updated and moved images.
Bug: 30257320
Change-Id: I3440fe1b74947cbfbd1ada6f5d6bee5e49847927
For Android N release, migrating and updating PIP preview docs
into regular DAC TV docs. Updating TOCs and redirects as well.
Bug: 26487936
Change-Id: I00a57cc0bfff6929cdba56ce00a6a5e9a292e345
