Delete unused and unfinished legacy MediaPlayer wrapper

This was just for testing and finishing this class is not useful
as it can't wrap an existing MediaPlayer without owning it to
track its state.

PiperOrigin-RevId: 524851654

library/common/src/main/java/com/google/android/exoplayer2/LegacyMediaPlayerWrapper.java

-/*
- * Copyright 2022 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.google.android.exoplayer2;
-
-import android.media.MediaPlayer;
-import android.os.Looper;
-import com.google.common.util.concurrent.Futures;
-import com.google.common.util.concurrent.ListenableFuture;
-
-/** A {@link Player} wrapper for the legacy Android platform {@link MediaPlayer}. */
-public final class LegacyMediaPlayerWrapper extends SimpleBasePlayer {
-
-  private final MediaPlayer player;
-
-  private boolean playWhenReady;
-
-  /**
-   * Creates the {@link MediaPlayer} wrapper.
-   *
-   * @param looper The {@link Looper} used to call all methods on.
-   */
-  public LegacyMediaPlayerWrapper(Looper looper) {
-    super(looper);
-    this.player = new MediaPlayer();
-  }
-
-  @Override
-  protected State getState() {
-    return new State.Builder()
-        .setAvailableCommands(new Commands.Builder().addAll(Player.COMMAND_PLAY_PAUSE).build())
-        .setPlayWhenReady(playWhenReady, Player.PLAY_WHEN_READY_CHANGE_REASON_USER_REQUEST)
-        .build();
-  }
-
-  @Override
-  protected ListenableFuture<?> handleSetPlayWhenReady(boolean playWhenReady) {
-    this.playWhenReady = playWhenReady;
-    // TODO: Only call these methods if the player is in Started or Paused state.
-    if (playWhenReady) {
-      player.start();
-    } else {
-      player.pause();
-    }
-    return Futures.immediateVoidFuture();
-  }
-}