title: minSdk != deviceSdk
body: <p>I just recently started getting into Android development. I feel this is a very stupid question but I'll shoot anyway since I've spent an hour on this already. I am currently trying to run a project on my device, with no changes to what Android Studio gave me. I think this image should describe my problem better:</p>
  <p><img src="https://i.stack.imgur.com/JJAZn.png" alt="enter image description here" /></p>
  <p>When running I get <code>Failure [INSTALL_FAILED_OLDER_SDK]</code>.</p>
  <p>I can't understand why they are not compatible. Rather, why does <code>minSdk</code> say API 20 when <code>minSdkVersion</code> on build.gradle says 15? I've tried adding <code>uses-sdk</code> on manifest.xml but I figured that would be unnecessary since my build.gradle file will overwrite that (it didn't work also).</p>
  <p>Am I missing some kind of setting here?</p>