[Android] Temporarily force gtests to be unmanaged.

There's a little more to support these as managed both in packaging and the
scripts that run tests. Disable for now.
BUG=158821
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/14198002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193776 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed