docs: Removing radio from music intents

<dt>{@link android.provider.MediaStore#EXTRA_MEDIA_FOCUS MediaStore.EXTRA_MEDIA_FOCUS} (required)</dt>

<dd>

<p>Indicates the search mode (whether the user is looking for a particular artist, album, song,

playlist, or radio channel). Most search modes take additional extras. For example, if the user

or playlist). Most search modes take additional extras. For example, if the user

is interested in listening to a particular song, the intent might have three additional extras:

the song title, the artist, and the album. This intent supports the following search modes for

each value of {@link android.provider.MediaStore#EXTRA_MEDIA_FOCUS}:</p>

      intent as an unstructured search.</li>

</ul>

</dd>

<dt><p><em>Radio channel</em> - <code>"vnd.android.cursor.item/radio"</code></p></dt>

<dd>

<p>Play a particular radio channel or a radio channel that matches some criteria specified

by additional extras.</p>

<p>Additional extras:</p>

<ul>

  <li>{@link android.provider.MediaStore#EXTRA_MEDIA_ALBUM} - The album.</li>

  <li>{@link android.provider.MediaStore#EXTRA_MEDIA_ARTIST} - The artist.</li>

  <li><code>"android.intent.extra.genre"</code> - The genre.</li>

  <li><code>"android.intent.extra.radio_channel"</code> - The radio channel.</li>

  <li>{@link android.provider.MediaStore#EXTRA_MEDIA_TITLE} - The song name that the radio

      channel is based on.</li>

  <li>{@link android.app.SearchManager#QUERY} (required) - A string that contains any combination

      of: the album, the artist, the genre, the radio channel, or the title. This extra is

      always provided for backward compatibility: existing apps that do not know about search

      modes can process this intent as an unstructured search.</li>

</ul>

</dd>

<dt><p><em>Playlist</em> - {@link android.provider.MediaStore.Audio.Playlists#ENTRY_CONTENT_TYPE Audio.Playlists.ENTRY_CONTENT_TYPE}</p></dt>

<dd>

<p>Play a particular playlist or a playlist that matches some criteria specified

<p><b>Example intent:</b></p>

<p>If the user wants to listen to a radio station that plays songs from a particular artist,

a search app may generate the following intent:</p>

<p>If the user wants to listen to music from a particular artist, a search app may generate the

following intent:</p>

<pre>

public void playSearchRadioByArtist(String artist) {

public void playSearchArtist(String artist) {

    Intent intent = new Intent(MediaStore.INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH);

    intent.putExtra(MediaStore.EXTRA_MEDIA_FOCUS,

                    "vnd.android.cursor.item/radio");

                    MediaStore.Audio.Artists.ENTRY_CONTENT_TYPE);

    intent.putExtra(MediaStore.EXTRA_MEDIA_ARTIST, artist);

    intent.putExtra(SearchManager.QUERY, artist);

    if (intent.resolveActivity(getPackageManager()) != null) {

        String artist = intent.getStringExtra(MediaStore.EXTRA_MEDIA_ARTIST);

        String genre = intent.getStringExtra("android.intent.extra.genre");

        String playlist = intent.getStringExtra("android.intent.extra.playlist");

        String rchannel = intent.getStringExtra("android.intent.extra.radio_channel");

        String title = intent.getStringExtra(MediaStore.EXTRA_MEDIA_TITLE);

        // Determine the search mode and use the corresponding extras

            // 'Song' search mode

            playSong(album, artist, genre, title);

        } else if (mediaFocus.compareTo("vnd.android.cursor.item/radio") == 0) {

            // 'Radio channel' search mode

            playRadioChannel(album, artist, genre, rchannel, title);

        } else if (mediaFocus.compareTo(MediaStore.Audio.Playlists.ENTRY_CONTENT_TYPE) == 0) {

            // 'Playlist' search mode

            playPlaylist(album, artist, genre, playlist, title);