Make SonicAudioProcessor public

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=153762476

library/core/src/main/java/com/google/android/exoplayer2/audio/SonicAudioProcessor.java

@@ -26,8 +26,7 @@ import java.nio.ShortBuffer;
 /**
 /**
  * An {@link AudioProcessor} that uses the Sonic library to modify the speed/pitch of audio.
  * An {@link AudioProcessor} that uses the Sonic library to modify the speed/pitch of audio.
  */
  */
-// TODO: Make public once it is possible to override AudioTrack's position calculations.
-/* package */ final class SonicAudioProcessor implements AudioProcessor {
+public final class SonicAudioProcessor implements AudioProcessor {
 
 
   /**
   /**
    * The maximum allowed playback speed in {@link #setSpeed(float)}.
    * The maximum allowed playback speed in {@link #setSpeed(float)}.