Reland of Android Media Notification: remove "Touch to return" text.

Reland of Android Media Notification: remove "Touch to return" text. (patchset #1 id:1 of https://codereview.chromium.org/1307093008/ )

Reason for revert:
Wrongful conviction.

Original issue's description:
> Revert of Android Media Notification: remove "Touch to return" text. (patchset #1 id:1 of https://codereview.chromium.org/1326163002/ )
>
> Reason for revert:
> This breaks the downstream test HostDriven_SigninTest.testManagedSignin.
>
> Original issue's description:
> > Android Media Notification: remove "Touch to return" text.
> >
> > The notification only shows the origin. Touching the notification to
> > return to the playing application is a very common pattern on Android.
> > It is not required for us to reinforce it with text, making the
> > notification less appealing.
> >
> > BUG=528202
> >
> > Committed: https://crrev.com/ded797a710c1a07b06f8d84d697c54671a942b35
> > Cr-Commit-Position: refs/heads/master@{#347377}
>
> TBR=avayvod@chromium.org,ianwen@chromium.org,mlamouri@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=528202
>
> Committed: https://crrev.com/2fa386cfd0174b20b8ec67c3e3a2503ef479bd3a
> Cr-Commit-Position: refs/heads/master@{#347533}

TBR=avayvod@chromium.org,ianwen@chromium.org,nyquist@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=528202
Committed: https://crrev.com/1626ba4e9367faad4bfd68b23a46a2e0f7ae7d5f
Cr-Commit-Position: refs/heads/master@{#347572}

[mlamouri (slow - plz ping), 2015-09-05 14:55:07]

Created Reland of Android Media Notification: remove "Touch to return" text.

[commit-bot: I haz the power, 2015-09-05 14:55:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1306123010/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1306123010/1

[commit-bot: I haz the power, 2015-09-05 14:55:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-05 14:56:25]

Patchset 1 (id:??) landed as
https://crrev.com/1626ba4e9367faad4bfd68b23a46a2e0f7ae7d5f
Cr-Commit-Position: refs/heads/master@{#347572}