[Android] Don't push deps when listing gtests.

[Android] Don't push deps when listing gtests.

PushDataDeps takes a long time even when all files are on the device
because calculating the digests of all the files takes _much_ longer
on a device than it does on a host.

Skipping the push step during test listing -- where the data deps are
unnecessary -- means that we don't try to push files twice in each
gtest run, so we skip all of the device-side MD5 calculations that
would happen in the second run.

BUG=400440
Committed: https://crrev.com/5c10479a0c3572cd41062b453c3e85527b5cfbad
Cr-Commit-Position: refs/heads/master@{#294667}

[jbudorick, 2014-09-11 01:15:15]

jbudorick@chromium.org changed reviewers:
+ cjhopman@chromium.org, klundberg@chromium.org, starodub@chromium.org

[klundberg, 2014-09-11 03:47:43]

lgtm

[cjhopman, 2014-09-12 20:26:30]

lgtm

[jbudorick, 2014-09-12 20:32:05]

The CQ bit was checked by jbudorick@chromium.org

[commit-bot: I haz the power, 2014-09-12 20:34:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/560133002/1

[commit-bot: I haz the power, 2014-09-12 21:41:59]

Committed patchset #1 (id:1) as f305d0191cc020934c6f13db54e46ffb8d24e647

[commit-bot: I haz the power, 2014-09-12 21:46:30]

Patchset 1 (id:??) landed as
https://crrev.com/5c10479a0c3572cd41062b453c3e85527b5cfbad
Cr-Commit-Position: refs/heads/master@{#294667}

[jbudorick, 2014-10-02 23:31:25]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/627553002/ by jbudorick@chromium.org.

The reason for reverting is: While we do want to only attempt to push once, this
isn't the right way to do it. We should push _before_ attempting to list the
tests, then be done with it.

Also, this breaks https://codereview.chromium.org/537063002/.