title: Change Padding in Selector drawable
body: <p>i am trying to change the padding from a Button in a custom drawable ressource, and reuse this in a selector.
  Changing the drawable seems not the Problem, but the App always use the highest padding aviable from the different drawables:</p>
  
  <p>button_inactive.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;layer-list xmlns:android="http://schemas.android.com/apk/res/android" &gt;
  
  &lt;item&gt;
      &lt;shape android:shape="rectangle" &gt;
          &lt;solid android:color="#FF4d681f" /&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  &lt;item
      android:bottom="2dp"
      android:left="2dp"
      android:right="2dp"
      android:top="2dp"&gt;
      &lt;shape android:shape="rectangle" &gt;
          &lt;solid android:color="#FFFFFFFF" /&gt;
  
          &lt;padding
              android:bottom="5dp"
              android:top="5dp" /&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  </code></pre>
  
  <p>
  </p>
  
  <p>button_active.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;layer-list xmlns:android="http://schemas.android.com/apk/res/android" &gt;
  &lt;item&gt;
      &lt;shape android:shape="rectangle" &gt;
          &lt;solid android:color="#FF4D681F" /&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  &lt;item
      android:bottom="2dp"
      android:left="2dp"
      android:right="2dp"
      android:top="2dp"&gt;
      &lt;shape android:shape="rectangle" &gt;
          &lt;solid android:color="#FF8da32d" /&gt;
  
          &lt;padding
              android:bottom="10dp"
              android:top="10dp" /&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  </code></pre>
  
  <p></p>
  
  <p>button_selector.xml</p>
  
  <pre><code>&lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  &lt;item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/button_active"/&gt;
  &lt;item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/button_active"/&gt;
  &lt;item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/button_active"/&gt;
  &lt;item android:drawable="@drawable/button_inactive"/&gt;
  </code></pre>
  
  <p></p>
  
  <p>The Problem is that my Button uses the 10dp padding in all states, including the "inactive" state.</p>
  
  <p>Is there a Solution to get it working only with XML or it is better to make a custom Button programaticly?</p>