[android] Show keyboard switcher icon.

[android] Show keyboard switcher icon.

Show the keyboard switcher icon on the right edge of the navigation bar
when two or more IMEs are enabled and a physical keyboard is connected.

BUG=452543
Committed: https://crrev.com/fde85e212656c2187cecafd3dad016237005da02
Cr-Commit-Position: refs/heads/master@{#313660}

[please use gerrit instead, 2015-01-28 20:46:26]

rouslan@chromium.org changed reviewers:
+ yukawa@chromium.org

[please use gerrit instead, 2015-01-28 20:46:27]

Yohei, PTAL.

[please use gerrit instead, 2015-01-28 20:46:50]

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

[please use gerrit instead, 2015-01-28 20:46:50]

Aurimas, OWNERS PTAL.

[aurimas (slooooooooow), 2015-01-28 20:49:01]

lgtm

[yukawa, 2015-01-29 03:15:26]

The CQ bit was checked by yukawa@chromium.org

[yukawa, 2015-01-29 03:15:27]

lgtm

[commit-bot: I haz the power, 2015-01-29 03:16:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/879403003/1

[commit-bot: I haz the power, 2015-01-29 03:48:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-29 03:49:27]

Patchset 1 (id:??) landed as
https://crrev.com/fde85e212656c2187cecafd3dad016237005da02
Cr-Commit-Position: refs/heads/master@{#313660}