title: Adaptive Icon not working
body: <p>manifest:</p>
  
  <pre><code>&lt;application
      android:name="..."
      android:allowBackup="false"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/MyTheme"
      tools:replace="icon,label,theme,name,allowBackup"&gt;
  </code></pre>
  
  <p>under the folder <code>mipmap-anydpi-v26</code> I have defined <code>ic_launcher.xml</code>:</p>
  
  <pre><code>&lt;adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android"&gt;
     &lt;background android:drawable="@color/white"/&gt;
     &lt;foreground android:drawable="@mipmap/ic_launcher_foreground"/&gt;
  &lt;/adaptive-icon&gt;
  </code></pre>
  
  <p>here is my folder structure :
  <a href="https://i.stack.imgur.com/Z97yV.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Z97yV.png" alt="enter image description here"></a></p>
  
  <p>build.gradle:</p>
  
  <pre><code>compileSdkVersion = 26
  buildToolsVersion = "25.0.2"
  supportLibVersion = "25.3.1"
  targetSdkVersion = 25
  minSdkVersion = 18
  </code></pre>
  
  <p>AND, I'm using android studio 3.0</p>
  
  <p>but the end result is that I get a default android icon instead of the one I provided.</p>
  
  <p>I've also tried putting the foreground png in all of the density folders (mipmap-xhdpi, etc), although I used the same png for all when I did this just for testing</p>