title: Androidx ConstraintLayout does not allow its children to be moved around or have their constraints edited
body: <p>I am using the new androidx libraries and the <code>androidx.constraintlayout.ConstraintLayout</code> component is not allowing its children to be dragged around in the palette and does not show the ability to edit the  constraints of its children.</p>
  
  <p>Here is the XML:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;androidx.constraintlayout.ConstraintLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:context=".AddNewPlayer"&gt;
  
      &lt;com.google.android.material.textfield.TextInputEditText
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:id="@+id/player_name_field"
          android:hint="Player Name" /&gt;
  
  &lt;/androidx.constraintlayout.ConstraintLayout&gt;
  </code></pre>
  
  <p>And here is the gradle info:</p>
  
  <pre><code>implementation 'androidx.constraintlayout:constraintlayout:1.1.1'
  implementation 'com.google.android.material:material:1.0.0-alpha3'
  </code></pre>
  
  <p>Has anyone else had this issue? How do I resolve this?</p>