title: Android Scale Animation with bounce interpolator
body: <p>I am doing a scale animation with <code>anim xml</code> as follows. The animation interpolator isn't working. I am trying to have bounce interpolator but isn't working. </p>
  
  <pre><code>    &lt;?xml version="1.0" encoding="utf-8"?&gt;
      &lt;set xmlns:android="http://schemas.android.com/apk/res/android" &gt;
  
      &lt;scale
          android:duration="900"
          android:fromXScale="1"
          android:fromYScale="0.5"
          android:interpolator="@android:anim/bounce_interpolator"
          android:pivotX="50%"
          android:pivotY="0%"
          android:toXScale="1.0"
          android:toYScale="1.0" /&gt;
       &lt;/set&gt;
  </code></pre>
  
  <p>EDIT:
  Actually my whole xml is </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;set xmlns:android="http://schemas.android.com/apk/res/android" &gt;
  
  &lt;scale
      android:duration="600"
      android:fromXScale="1"
      android:fromYScale="0.5"
      android:interpolator="@android:anim/bounce_interpolator"
      android:pivotX="50%"
      android:pivotY="0%"
      android:toXScale="1.0"
      android:toYScale="1.0" /&gt;
  
  &lt;alpha
      android:duration="@android:integer/config_longAnimTime"
      android:fromAlpha="0.0"
      android:interpolator="@android:anim/decelerate_interpolator"
      android:toAlpha="1.0" /&gt;
  
  &lt;/set&gt;
  </code></pre>