Disk cache: Disable V3 index_table for android.

BUG=241277, 333263
R=rdsmith@chromium.org
TBR=rdsmith@chromium.org

Review URL: https://codereview.chromium.org/134803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244243 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244243