title: DrawableCompat tinting does not work on pre-Lollipop
body: <p>I'm using the new TextInputLayout to wrap an EditText.  When I determine a field has an error I do the following:</p>
  
  <pre><code>Drawable drawable = DrawableCompat.wrap(getEditText().getBackground());
  
  DrawableCompat.setTintList(drawable, ColorStateList.valueOf(Color.RED));
  </code></pre>
  
  <p>This works on 5.0 and turns the underline red, but does nothing on 4.4 or 4.1 test devices.  What am I missing here?  Seems so simple and according to google "just works"... pretty sure I have the latest version of it as well:</p>
  
  <p>compile 'com.android.support:design:22.2.0'</p>
  
  <p>FWIW, if I do setColorFilter instead of setTint then it works on all platforms but then I have issues with it going away and not coming back as soon as the focus is set/left/etc... I'd prefer to do it with tint (and really prefer to have the tint apply to the focus and non-focus states if anybody is looking for extra credit lol)</p>
  
  <p>Thanks!</p>