title: MotionLayout ignores padding
body: <p>I'm trying to animate margin, padding and alpha of a textview on swipe.
  At the start, there is no padding of the textview, alpha is 1.
  At the end, I want alpha to be 0, padding to be 100dp, 16dp dp margin on the sides, alpha to be 0.5
  Everything works, except the padding is not changing.
  Does MotionLayout support padding?
  I'm using androidx.constraintlayout:constraintlayout:2.0.0-beta4.</p>
  
  <p>adding more text since SO says that my post looks like is mostly code...
  adding more text since SO says that my post looks like is mostly code...
  adding more text since SO says that my post looks like is mostly code...</p>
  
  <p>The layout xml:</p>
  
  <pre><code>    &lt;androidx.constraintlayout.motion.widget.MotionLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"
      android:id="@+id/layoutParent"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      app:layoutDescription="@xml/test"&gt;
  
      &lt;TextView
          android:id="@+id/fakenavigationBar"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          app:layout_constraintStart_toStartOf="parent"
          app:layout_constraintTop_toTopOf="parent"
          android:text="hello world"&gt;
      &lt;/TextView&gt;
  &lt;/androidx.constraintlayout.motion.widget.MotionLayout&gt;
  </code></pre>
  
  <p>The motion 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;ConstraintSet android:id="@+id/start"&gt;
          &lt;Constraint
              android:id="@id/fakenavigationBar"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:alpha="1"
              android:padding="100dp"
              motion:layout_constraintTop_toTopOf="parent"
              motion:layout_constraintStart_toStartOf="parent"&gt;
          &lt;/Constraint&gt;
  
      &lt;/ConstraintSet&gt;
  
      &lt;ConstraintSet android:id="@+id/end"&gt;
          &lt;Constraint
              android:id="@id/fakenavigationBar"
              android:layout_width="0dp"
              android:layout_height="wrap_content"
              android:layout_marginStart="16dp"
              android:layout_marginEnd="16dp"
              android:alpha="0.5"
              motion:layout_constraintStart_toStartOf="parent"
              motion:layout_constraintEnd_toEndOf="parent"
              motion:layout_constraintBottom_toBottomOf="parent"&gt;
          &lt;/Constraint&gt;
  
      &lt;/ConstraintSet&gt;
  
      &lt;Transition
          motion:constraintSetStart="@+id/start"
          motion:constraintSetEnd="@+id/end"
          motion:duration="2000"
          motion:motionInterpolator="linear"&gt;
  
          &lt;OnSwipe
              motion:touchAnchorId="@+id/fakenavigationBar"
              motion:touchAnchorSide="top"
              motion:dragDirection="dragDown"/&gt;
      &lt;/Transition&gt;
  &lt;/MotionScene&gt;
  </code></pre>
  
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