Reland: Run mojo unit tests on the Android main waterfall.

Reland: Run mojo unit tests on the Android main waterfall.

The original CL broke the bot with this compile error:
  ninja:error: unknown target 'html_viewer_unittests_apk'
This CL also renames the targets to their output names.
(we could also fix *_apk target names, but this seems okay)
Also add mojo_view_manager_lib_unittests to the list.

Description from https://codereview.chromium.org/1145343005
Run Mojo additional unit tests on the "Android GN" bot:
http://build.chromium.org/p/chromium.linux/builders/Android%20GN
(No CQ yet; need Android GN testing support/devices there...)
Add the necessary target mappings to ninja_to_gn.pyl

Similar tests already run on Linux GN and our chromium.mojo FYI:
http://build.chromium.org/p/chromium.linux/builders/Linux%20GN
http://build.chromium.org/p/chromium.mojo/builders/Chromium%20Mojo%20Android

BUG=478244, 359249
TEST=Steps run and pass on the bot.
R=dpranke@chromium.org,sky@chromium.org

Committed: https://crrev.com/056493c2718ee1017c6acf3c2bb8056e6c77731f
Cr-Commit-Position: refs/heads/master@{#335293}

[msw, 2015-06-18 23:17:11]

msw@chromium.org changed reviewers:
+ dpranke@chromium.org, sky@chromium.org

[msw, 2015-06-19 00:06:18]

Hey Dirk, please take a look at testing/buildbot/*; thanks!
Hey Scott, please take a look at */BUILD.gn; thanks!

[Dirk Pranke, 2015-06-19 00:55:29]

lgtm

[sky, 2015-06-19 03:52:21]

LGTM

[msw, 2015-06-19 07:13:57]

The CQ bit was checked by msw@chromium.org

[commit-bot: I haz the power, 2015-06-19 07:14:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1195623002/40001

[msw, 2015-06-19 08:19:38]

The CQ bit was unchecked by msw@chromium.org

[msw, 2015-06-19 16:35:00]

I stopped the CQ from landing this, because some ipc_mojo_unittests timeout on
Android. I filed http://crbug.com/502290 and landed
https://codereview.chromium.org/1193933003/ to disable the failing fixtures
before trying to land this.

[msw, 2015-06-19 18:03:06]

Okay, the FYI bot went green. I'll try landing this and keep a close eye on
both.

[msw, 2015-06-19 18:03:17]

The CQ bit was checked by msw@chromium.org

[commit-bot: I haz the power, 2015-06-19 18:05:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1195623002/40001

[commit-bot: I haz the power, 2015-06-19 18:12:56]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-06-19 18:13:50]

Patchset 3 (id:??) landed as
https://crrev.com/056493c2718ee1017c6acf3c2bb8056e6c77731f
Cr-Commit-Position: refs/heads/master@{#335293}