title: Element TextViewCompat is not allowed here
body: <p>I'm trying to use TextViewCompat on my app to support older android versions according this <a href="https://developer.android.com/guide/topics/ui/look-and-feel/autosizing-textview" rel="nofollow noreferrer">article</a> from Android Documentation.</p>
  
  <p>But I'm facing this waring on Android Studio:</p>
  
  <blockquote>
    <p>Element TextViewCompat is not allowed here
    This inspection highlights unallowed XML tags in Android resource files and AndroidManifest.xml</p>
  </blockquote>
  
  <p>What am I doing wrong?</p>
  
  <p><a href="https://i.stack.imgur.com/PZ2lB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PZ2lB.png" alt="enter image description here"></a></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.constraint.ConstraintLayout
      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/parent"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:context=".MainActivity"&gt;
  
      &lt;Button
          android:id="@+id/button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="Button"
          app:layout_constraintBottom_toBottomOf="parent"
          app:layout_constraintEnd_toEndOf="parent"
          app:layout_constraintHorizontal_bias="0.841"
          app:layout_constraintStart_toStartOf="parent"
          app:layout_constraintTop_toTopOf="parent"
          app:layout_constraintVertical_bias="0.87" /&gt;
  
      &lt;TextViewCompat
          android:id="@+id/textView2"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_marginBottom="8dp"
          android:layout_marginTop="8dp"
          android:textSize="120sp"
          android:text="10 min"
          app:layout_constraintBottom_toTopOf="@+id/button"
          app:layout_constraintEnd_toEndOf="parent"
          app:layout_constraintStart_toStartOf="parent"
          app:layout_constraintTop_toTopOf="parent" /&gt;
  
  &lt;/android.support.constraint.ConstraintLayout&gt;
  </code></pre>