title: EditText with type numberDecimal doesn't allow values starting with 0
body: <p>I have an EditText with inputType <code>numberDecimal</code>, so it should allow insertion of decimal values, like 4.2, 3.14 etc. But it doesn't allow me to insert values &lt; 1.0, it's impossible to write 0.something, because the number doesn't appear in the EditText. The text simply cannot start with "0" for some reason.</p>
  
  <p>How do I allow user to write any number larger or equal 0.0?</p>
  
  <p>Tested on Android 7.0.1</p>
  
  <p>EditText XML:</p>
  
  <pre><code>&lt;EditText
    android:id="@+id/editText"
    android:layout_width="match_parent"
    android:layout_height="match_parent" 
    android:maxEms="10"
    android:layout_gravity="center"   
    android:inputType="numberDecimal"
    android:textSize="16dp" 
    android:digits="0123456789." /&gt;
  </code></pre>