[Android] Make provision_devices.KillHostHeartbeat public again.

[Android] Make provision_devices.KillHostHeartbeat public again.

This also brings back retries on the wipe because bots occasionally
were failing it.

BUG=475527
Committed: https://crrev.com/809d9afff01171cdafa9f493b0bbbf2ab30f90ab
Cr-Commit-Position: refs/heads/master@{#324459}

[jbudorick, 2015-04-09 15:20:24]

jbudorick@chromium.org changed reviewers:
+ navabi@chromium.org, sullivan@chromium.org

[sullivan, 2015-04-09 15:56:01]

lgtm

Thanks for the quick fix!

[jbudorick, 2015-04-09 15:56:18]

The CQ bit was checked by jbudorick@chromium.org

[commit-bot: I haz the power, 2015-04-09 15:56:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1078623003/1

[jbudorick, 2015-04-09 15:56:45]

On 2015/04/09 15:56:01, sullivan (OOO April 6-10) wrote:
> lgtm
> 
> Thanks for the quick fix!

"OOO" :P

np, sorry for the break

[commit-bot: I haz the power, 2015-04-09 16:45:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-09 16:46:52]

Patchset 1 (id:??) landed as
https://crrev.com/809d9afff01171cdafa9f493b0bbbf2ab30f90ab
Cr-Commit-Position: refs/heads/master@{#324459}