Files.app: Disable all transfer tests.

Some flaly transfer tests are disabled by crrev.com/242393.
And other transfer tests also failed due to the same reason.
This patch disables all the transfer tests.

BUG=330549
TEST=none
TBR=mtomasz

Review URL: https://codereview.chromium.org/98703004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242459 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242459