[Android] Adding tests for jlongArray conversions to vectors

[Android] Adding tests for jlongArray conversions to vectors

I noticed that I didn't have the test for my last checkin and that the
method I based mine on didn't have one (perhaps for the same issue I had
to add my method).

This patch is fixing that.

Original checkin: https://codereview.chromium.org/1314753002/

Committed: https://crrev.com/eeea62d3d48453de1a593b9f944523b4ec4f3efc
Cr-Commit-Position: refs/heads/master@{#346498}

[fgorski, 2015-08-27 00:16:51]

fgorski@chromium.org changed reviewers:
+ nyquist@chromium.org

[fgorski, 2015-08-27 00:16:51]

Tommy, no rush. This is just adding tests to the code I added last time + a test
for the original method.

[nyquist, 2015-08-31 21:45:21]

lgtm. thanks for doing this!

[fgorski, 2015-08-31 22:22:34]

The CQ bit was checked by fgorski@chromium.org

[commit-bot: I haz the power, 2015-08-31 22:23:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1316243003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1316243003/1

[commit-bot: I haz the power, 2015-08-31 22:39:19]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-31 22:39:49]

Patchset 1 (id:??) landed as
https://crrev.com/eeea62d3d48453de1a593b9f944523b4ec4f3efc
Cr-Commit-Position: refs/heads/master@{#346498}