Revert of [Android] JUnit runner + gyp changes.

Revert of [Android] JUnit runner + gyp changes. (patchset #15 id:280001 of https://codereview.chromium.org/574433003/)

Reason for revert:
Speculative revert: Android test started flaking a ton after this landed. Affected targets androidwebview_instrumentation_tests, chromeshell_instrumentation_tests, contentshell_instrumentation_tests. This CL seems the most likely in the blamelist of https://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/15905.

Original issue's description:
> [Android] JUnit runner + gyp changes.
>
> This adds Java code for running junit tests, as well as gyp targets for
> both runnable and non-runnable host-side JARs.
>
> BUG=316383
>
> Committed: https://crrev.com/2e56d4508e33de5fc60bbbb41c5a5d5534e88174
> Cr-Commit-Position: refs/heads/master@{#296340}

TBR=cjhopman@chromium.org,nyquist@chromium.org,aurimas@chromium.org,jbudorick@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=316383
Committed: https://crrev.com/54b9408f8b18e3bf3a33343e375186e1949e8e86
Cr-Commit-Position: refs/heads/master@{#296384}

[phoglund_chromium, 2014-09-24 11:11:14]

Created Revert of [Android] JUnit runner + gyp changes.

[commit-bot: I haz the power, 2014-09-24 11:12:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/597123002/1

[commit-bot: I haz the power, 2014-09-24 11:12:55]

Committed patchset #1 (id:1) as 503dc592852cc8708a8a03021abeb1f1d01f0567

[commit-bot: I haz the power, 2014-09-24 11:13:37]

Patchset 1 (id:??) landed as
https://crrev.com/54b9408f8b18e3bf3a33343e375186e1949e8e86
Cr-Commit-Position: refs/heads/master@{#296384}

[phoglund_chromium, 2014-09-24 14:01:05]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/596303002/ by phoglund@chromium.org.

The reason for reverting is: Didn't help. We probably got scheduled on other,
flakier Android devices which caused tests to start flaking, or something else
is the root cause..