title: 9-patch padding doesn't adjust correctly
body: <p>Adding a 9-patch:</p>
  
  <p><img src="https://i.stack.imgur.com/bR6FO.png" alt="enter image description here"></p>
  
  <p>Seems ok here:</p>
  
  <p><img src="https://i.stack.imgur.com/K3cV0.png" alt="enter image description here"></p>
  
  <p>However, after adding <code>android:padding="5dp"</code>, the padding doesn't just happen around the content. Also, the arrow stretches a bit. Is my 9-patch drawn incorrectly?</p>
  
  <p><img src="https://i.stack.imgur.com/Tpm00.png" alt="enter image description here"></p>
  
  <p>TextView:</p>
  
  <p><img src="https://i.stack.imgur.com/cX4Je.png" alt="enter image description here"></p>