Revert of [Android] Don't use a device blacklist if one isn't provided.

Revert of [Android] Don't use a device blacklist if one isn't provided. (patchset #1 id:1 of https://codereview.chromium.org/1314823011/ )

Reason for revert:
Suspect causing build failure (provision_devices step)

BUG=530242
Original issue's description:
> [Android] Don't use a device blacklist if one isn't provided.
> 
> BUG=517709
> 
> Committed: https://crrev.com/be5c91849d2196f97c7a4e0b3e90597c3f2b4c40
> Cr-Commit-Position: refs/heads/master@{#347473}

TBR=rnephew@chromium.org,jbudorick@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=517709

[nednguyen, 2015-09-10 17:25:06]

Created Revert of [Android] Don't use a device blacklist if one isn't provided.

[commit-bot: I haz the power, 2015-09-10 17:25:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1329343004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1329343004/1

[jbudorick, 2015-09-10 17:25:50]

The CQ bit was unchecked by jbudorick@chromium.org

[jbudorick, 2015-09-10 17:25:57]

On 2015/09/10 at 17:25:39, commit-bot wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1329343004/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1329343004/1

wrong CL.