[Cast,Android] Replace custom MediaController with android.widget.MediaController.

[Cast,Android] Replace custom MediaController with android.widget.MediaController.

BUG=722688
TEST=manual (cast a video from Chrome and tap on the notification, test the fullscreen controls)

Review-Url: https://codereview.chromium.org/2888653002
Cr-Original-Commit-Position: refs/heads/master@{#472583}
Review-Url: https://codereview.chromium.org/2888273002 .
Cr-Commit-Position: refs/branch-heads/3071@{#613}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/eda6f4cf4ff69bea98350b37c43609fae020175c

[whywhat, 2017-05-18 01:31:36]

Description was changed from

==========
[Cast,Android] Replace custom MediaController with
android.widget.MediaController.

BUG=722688
TEST=manual (cast a video from Chrome and tap on the notification, test the
fullscreen controls)

Review-Url: https://codereview.chromium.org/2888653002
Cr-Commit-Position: refs/heads/master@{#472583}
(cherry picked from commit 41ecb285107a4f13871031481cb865763779d87f)
==========

to

==========
[Cast,Android] Replace custom MediaController with
android.widget.MediaController.

BUG=722688
TEST=manual (cast a video from Chrome and tap on the notification, test the
fullscreen controls)

Review-Url: https://codereview.chromium.org/2888653002
Cr-Original-Commit-Position: refs/heads/master@{#472583}
Review-Url: https://codereview.chromium.org/2888273002 .
Cr-Commit-Position: refs/branch-heads/3071@{#613}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/eda6f4cf4ff69bea98350b37c436...
==========

[whywhat, 2017-05-18 01:31:38]

Committed patchset #1 (id:1) manually as
eda6f4cf4ff69bea98350b37c43609fae020175c.

[whywhat, 2017-05-23 15:51:53]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2899033002/ by avayvod@chromium.org.

The reason for reverting is: Caused
https://bugs.chromium.org/p/chromium/issues/detail?id=725028 and is not needed
for 59 yet..