Revert of [Android] Add context manager to record logcat during step(s).

Revert of [Android] Add context manager to record logcat during step(s). (patchset #7 id:80001 of https://codereview.chromium.org/1465343002/ )

Reason for revert:
Is causing failures on the CQ.

Going to revert and investigate.

Original issue's description:
> [Android] Add context manager to record logcat during step(s).
> 
> BUG=552069
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=297933

TBR=phajdan.jr@chromium.org,jbudorick@chromium.org,luqui@chromium.org,martiniss@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=552069

[mikecase (-- gone --), 2015-12-10 02:38:53]

This change seems to work for my test commit:
https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_android_...

But causes some changes in the CQ to fail for no reason:
https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_android_...
https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_android_...