Revert of Temporarily move android_rel_tests_recipe to 100% experiment to unblock CQ

Revert of Temporarily move android_rel_tests_recipe to 100% experiment to unblock CQ (patchset #1 id:1 of https://codereview.chromium.org/973063002/)

Reason for revert:
clang roll got reverted, this should no longer be needed

Original issue's description:
> Temporarily move android_rel_tests_recipe to 100% experiment to unblock CQ
>
> TBR=machenbach
>
> BUG=463436
>
> Committed: https://chromium.googlesource.com/chromium/src/+/064e04615cf8557e63c10aa7917ea23341116fa0

TBR=machenbach@chromium.org,phajdan.jr@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=463436
Committed: https://crrev.com/2b35c8e3046ccd7f3e344b9dc1053acd7dc5f4a9
Cr-Commit-Position: refs/heads/master@{#318947}

[Nico, 2015-03-03 21:51:35]

Created Revert of Temporarily move android_rel_tests_recipe to 100% experiment
to unblock CQ

[commit-bot: I haz the power, 2015-03-03 21:52:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/975093002/1

[commit-bot: I haz the power, 2015-03-03 21:54:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-03 21:56:10]

Patchset 1 (id:??) landed as
https://crrev.com/2b35c8e3046ccd7f3e344b9dc1053acd7dc5f4a9
Cr-Commit-Position: refs/heads/master@{#318947}

[Michael Achenbach, 2015-03-03 22:23:58]

lgtm