Revert of [Android] Refactor browser test execution.

Revert of [Android] Refactor browser test execution. (patchset #14 id:260001 of https://codereview.chromium.org/1165523002/)

Reason for revert:
broke cronet_sample_test_apk compilation :(

Original issue's description:
> [Android] Refactor browser test execution.
>
> This change allows us to run multiple browser tests within a single
> invocation of an app. It does so by moving the test activity into its
> own process, running each test individually within that activity, and
> killing the process between each test.
>
> BUG=472360
>
> Committed: https://crrev.com/b049103fa4848e304102a24e78c6ba994130a535
> Cr-Commit-Position: refs/heads/master@{#334149}

TBR=jochen@chromium.org,cjhopman@chromium.org,jaekyun@chromium.org,tedchoc@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=472360
Committed: https://crrev.com/de5ee37653080ea96ba50572f2241f3c8261056a
Cr-Commit-Position: refs/heads/master@{#334151}

[jbudorick, 2015-06-12 13:18:28]

Created Revert of [Android] Refactor browser test execution.

[commit-bot: I haz the power, 2015-06-12 13:18:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1186513002/1

[commit-bot: I haz the power, 2015-06-12 13:19:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-12 13:20:36]

Patchset 1 (id:??) landed as
https://crrev.com/de5ee37653080ea96ba50572f2241f3c8261056a
Cr-Commit-Position: refs/heads/master@{#334151}