Warnings with Gradle about artifacts after update to Android Studio 2.2
<p>a few days ago I've updated to Android Studio 2.2. After this, I've had a couple of warnings in my project:</p>

<pre><code>Warning:Ignoring Android API artifact com.google.android:android:1.6_r2 for debug
Warning:Ignoring Android API artifact com.google.android:android:1.6_r2 for release
</code></pre>

<p>Anyone knows the reason about it?</p>