Run android tests through runtest.py.

Run android tests through runtest.py.

This CL re-lands https://codereview.chromium.org/414383002. It fixed a bug
where debug testers failed to find binaries. TryServer failed to catch this
bug due to the fact that rel and dbg testers are sharing the same checkout on
bots. https://codereview.chromium.org/452263002/ was submitted to make sure any
tester that downloads and extracts archive will clean it up.

BUG=329102
R=yfriedman@chromium.org, navabi@chromium.org, jbudorick@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=289231

[zty, 2014-08-11 22:21:22]

I sincerely hope this is the last time I bug you guys about this one. Please
take a look. thanks

[navabi, 2014-08-12 01:30:58]

lgtm. thanks for fixing the problem that caused the previous CL to mistakenly
pass the CQ. Please wait for that fix to land before submitting this one, so
when you put this one through the CQ we know that it is correctly tested.

[navabi1, 2014-08-12 21:37:27]

lgtm

[zty, 2014-08-12 21:39:06]

The CQ bit was checked by zty@chromium.org

[commit-bot: I haz the power, 2014-08-12 21:45:30]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/zty@chromium.org/465723002/1

[zty, 2014-08-12 21:52:24]

The CQ bit was unchecked by zty@chromium.org

[zty, 2014-08-13 03:12:44]

The CQ bit was checked by zty@chromium.org

[commit-bot: I haz the power, 2014-08-13 03:16:20]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/zty@chromium.org/465723002/1

[Paweł Hajdan Jr., 2014-08-13 09:31:58]

LGTM

[commit-bot: I haz the power, 2014-08-13 09:36:42]

Change committed as 289231