Docs: Used NotificationCompat.MediaStyle

<h3 id="controllingMedia">Controlling Media Playback on the Lock Screen</h3>

<p>In Android 5.0 (API level 21) the lock screen no longer displays media controls

based on the {@link android.media.RemoteControlClient}, which is now deprecated. Instead, use the

{@link android.app.Notification.MediaStyle} template with the

{@link android.app.Notification.Builder#addAction(android.app.Notification.Action) addAction()}

method, which converts actions into clickable icons.</p>

<p class="note"><strong>Note:</strong> The template and the

{@link android.app.Notification.Builder#addAction(android.app.Notification.Action) addAction()}

method are not included in the support library, so these features run in Android 5.0 and higher

only.</p>

<p>To display media playback controls on the lock screen in Android 5.0, set the visibility

to {@link android.support.v4.app.NotificationCompat#VISIBILITY_PUBLIC}, as described above. Then add

the actions and set the {@link android.app.Notification.MediaStyle} template, as described in the

following sample code:</p>

<p>

  In Android 5.0 (API level 21) the lock screen no longer displays media

  controls based on the {@link android.media.RemoteControlClient}, which is

  now deprecated. Instead, use the {@link

  android.support.v7.app.NotificationCompat.MediaStyle} template with the

  {@link

  android.support.v4.app.NotificationCompat.Builder#addAction(android.support.v4.app.NotificationCompat.Action)

  addAction()} method, which converts actions into clickable icons.

</p>

<p>

  To display media playback controls on the lock screen in Android 5.0, set

  the visibility to {@link

  android.support.v4.app.NotificationCompat#VISIBILITY_PUBLIC}, as described

  above. Then add the actions and set the {@link

  android.support.v7.app.NotificationCompat.MediaStyle} template, as described

  in the following sample code:

</p>

<pre>

Notification notification = new Notification.Builder(context)

Notification notification = new NotificationCompat.Builder(context)

    // Show controls on lock screen even when user hides sensitive content.

    .setVisibility(Notification.VISIBILITY_PUBLIC)

    .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)

    .setSmallIcon(R.drawable.ic_stat_player)

    // Add media control buttons that invoke intents in your media service

    .addAction(R.drawable.ic_prev, "Previous", prevPendingIntent) // #0

    .addAction(R.drawable.ic_pause, "Pause", pausePendingIntent)  // #1

    .addAction(R.drawable.ic_next, "Next", nextPendingIntent)     // #2

    // Apply the media style template

    .setStyle(new Notification.MediaStyle()

    .setStyle(new NotificationCompat.MediaStyle()

        .setShowActionsInCompactView(1 /* #1: pause button */)

    .setMediaSession(mMediaSession.getSessionToken())

        .setMediaSession(mMediaSession.getSessionToken()))

    .setContentTitle("Wonderful music")

    .setContentText("My Awesome Band")

    .setLargeIcon(albumArtBitmap)