title: Android MotionLayout don't showing animation on real device
body: <p>I create animation in MotionLayout Editor in Android Studio 4.0.</p>
  
  <p>I have this animation scene:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;MotionScene 
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:motion="http://schemas.android.com/apk/res-auto"&gt;
  
      &lt;Transition
          motion:constraintSetEnd="@+id/end"
          motion:constraintSetStart="@id/start"
          motion:duration="1000"&gt;
         &lt;KeyFrameSet&gt;
         &lt;/KeyFrameSet&gt;
      &lt;/Transition&gt;
  
      &lt;ConstraintSet android:id="@+id/start"&gt;
          &lt;Constraint
              android:id="@+id/bt_authorization_login"
              motion:layout_constraintEnd_toEndOf="@+id/ll_login_password_container"
              motion:layout_constraintStart_toEndOf="parent"
              android:layout_width="0dp"
              android:layout_height="@dimen/_35sdp"
              android:visibility="invisible"
              motion:layout_constraintTop_toBottomOf="@+id/tv_authorization_forget_password"
              motion:layout_constraintStart_toStartOf="@+id/ll_login_password_container"
              android:layout_marginTop="@dimen/_16sdp" /&gt;
      &lt;/ConstraintSet&gt;
  
      &lt;ConstraintSet android:id="@+id/end"&gt;
      &lt;/ConstraintSet&gt;
  &lt;/MotionScene&gt;
  </code></pre>
  
  <p>Animation in MotionLayout Editor work is fine.
  <a href="https://i.stack.imgur.com/r6uBM.gif" rel="nofollow noreferrer">animation in editor</a></p>
  
  <p>But when I start it on real device, animation don't showing. I tryed on diferent devices.</p>
  
  <p>How to start animation on device?</p>