Set ENABLE_MANAGED_USERS #ifdef on Android.

TBR=nyquist@chromium.org,atwilson@chromium.org
BUG=244891

Review URL: https://codereview.chromium.org/63423003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235155 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235155
Docserver: Quick follow-up to fix mega-slowness from r235124 to get the server
running from tip again.

TBR=yoz@chromium.org

Review URL: https://codereview.chromium.org/70173005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235156 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235156