Remove spurious VisibleForTesting annotation

It needs to have package visiblity, otherwise nothing can use it.

PiperOrigin-RevId: 222821546

library/ui/src/main/java/com/google/android/exoplayer2/ui/spherical/TouchTracker.java

@@ -44,11 +44,10 @@ import android.view.View;
  * a nicer UI. An even more advanced UI would reproject the user's touch point into 3D and drag the
  * a nicer UI. An even more advanced UI would reproject the user's touch point into 3D and drag the
  * Mesh as the user moves their finger. However, that requires quaternion interpolation.
  * Mesh as the user moves their finger. However, that requires quaternion interpolation.
  */
  */
-// @VisibleForTesting
-/*package*/ class TouchTracker extends GestureDetector.SimpleOnGestureListener
+/* package */ class TouchTracker extends GestureDetector.SimpleOnGestureListener
     implements View.OnTouchListener {
     implements View.OnTouchListener {
 
 
-  /*package*/ interface Listener {
+  /* package */ interface Listener {
     void onScrollChange(PointF scrollOffsetDegrees);
     void onScrollChange(PointF scrollOffsetDegrees);
   }
   }