Update ChromeShell -> ChromePublic in Android Test Instructions.

Update ChromeShell -> ChromePublic in Android Test Instructions.

ChromeShell is going away and these use cases have been supplanted by
ChromePublic.

BUG=510220
Committed: https://crrev.com/17e4d24493bf909583948d61c5adfe9601386e19
Cr-Commit-Position: refs/heads/master@{#345824}

[newt (away), 2015-08-26 21:47:38]

newt@chromium.org changed reviewers:
+ aurimas@chromium.org

[newt (away), 2015-08-26 21:47:39]

PTAL

Hooray for src/docs!

[aurimas (slooooooooow), 2015-08-26 22:32:32]

lgtm

[newt (away), 2015-08-26 23:50:36]

The CQ bit was checked by newt@chromium.org

[commit-bot: I haz the power, 2015-08-26 23:51:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1314223005/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1314223005/20001

[commit-bot: I haz the power, 2015-08-27 00:04:21]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-27 00:04:21]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[newt (away), 2015-08-27 02:15:55]

newt@chromium.org changed reviewers:
+ jparent@chromium.org

[newt (away), 2015-08-27 02:15:55]

+jparent for doc OWNERS

[Julie Parent, 2015-08-27 08:23:35]

The CQ bit was checked by jparent@chromium.org

[Julie Parent, 2015-08-27 08:23:35]

lgtm

[commit-bot: I haz the power, 2015-08-27 08:23:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1314223005/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1314223005/20001

[commit-bot: I haz the power, 2015-08-27 09:07:33]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-08-27 09:08:46]

Patchset 2 (id:??) landed as
https://crrev.com/17e4d24493bf909583948d61c5adfe9601386e19
Cr-Commit-Position: refs/heads/master@{#345824}