Revert of [Android] Temporarily suppress RTL start&end check error.

Revert of [Android] Temporarily suppress RTL start&end check error. (patchset #1 id:1 of https://codereview.chromium.org/445753002/)

Reason for revert:
Android SDK fixed the issue, so we can convert back from warning to error.

Original issue's description:
> [Android] Temporarily suppress RTL start&end check error.
> 
> The newest Android SDK had start&end attributes in non -v17 resources.
> Temporarily change the checking script from error to warning so that
> people can continue to work before it is fixed. This should be
> reverted once the issue is addressed
> 
> BUG=None
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287711

TBR=newt@chromium.org,tedchoc@chromium.org,dfalcantara@chromium.org
BUG=None

Committed: https://crrev.com/992e0f97595ddf295f15550fcb3e9e5947c90108
Cr-Commit-Position: refs/heads/master@{#294038}

[Kibeom Kim (inactive), 2014-09-09 21:36:55]

Created Revert of [Android] Temporarily suppress RTL start&end check error.

[Kibeom Kim (inactive), 2014-09-09 21:39:56]

The CQ bit was checked by kkimlabs@chromium.org

[commit-bot: I haz the power, 2014-09-09 21:42:11]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/kkimlabs@chromium.org/555253004/40001

[Kibeom Kim (inactive), 2014-09-09 22:31:57]

The CQ bit was unchecked by kkimlabs@chromium.org

[Kibeom Kim (inactive), 2014-09-09 23:12:32]

The CQ bit was checked by kkimlabs@chromium.org

[commit-bot: I haz the power, 2014-09-09 23:25:09]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/kkimlabs@chromium.org/555253004/40001

[commit-bot: I haz the power, 2014-09-09 23:48:59]

Committed patchset #2 (id:40001) as 66c4e4305921f5580c7c77450f54b09f236f1364

[commit-bot: I haz the power, 2014-09-10 03:56:36]

Patchset 2 (id:??) landed as
https://crrev.com/992e0f97595ddf295f15550fcb3e9e5947c90108
Cr-Commit-Position: refs/heads/master@{#294038}