title: ic_launcher.xml not being used as app icon
body: <p>I'm developing an Android app.</p>
  
  <p>I'm trying to use ic_launcher.xml and ic_launcher_round.xml as app icons as I think that is the proper way?</p>
  
  <p>Anyway, I have one png image, 108x108px, 32bit color. I use it in both ic_launcher and ic_launcher_round as:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;background android:drawable="@drawable/ic_launcher_background" /&gt;
      &lt;foreground android:drawable="@drawable/app_icon" /&gt;
  &lt;/adaptive-icon&gt;
  </code></pre>
  
  <p>The code is the same for both xml files.</p>
  
  <p>The problem is that on newer os versions (8.0+, round icons) it works well, but on earlier versions it doesn't (7.0, square icons) it doesn't work at all, and defaults to standard android icon.</p>
  
  <p>I'm currently creating all images that I will use to replace ic_launcher.png in mipmaps, but aside from that can I do something else?</p>
  
  <p>In manifest, I use them as:</p>
  
  <pre><code>android:icon="@mipmap/ic_launcher"
  android:roundIcon="@mipmap/ic_launcher_round"
  </code></pre>