title: Cannot downgrade Android minimum sdk
body: <p>I have just created my first android app (for the um-teenth time).  I created the project with a higher sdk than I intended, and now I want to lower it.  My initial android maifest did not contain a <code>&lt;uses-sdk&gt;</code>section, so I added:</p>
  
  <pre><code>&lt;uses-sdk
      android:minSdkVersion="17"
      android:targetSdkVersion="17"
      android:maxSdkVersion="21" /&gt;
  </code></pre>
  
  <p>I also updated my build.gradle file to (relevant section):</p>
  
  <pre><code> defaultConfig {
      applicationId "dkuehn.myapp.myapp"
      minSdkVersion 17
      targetSdkVersion 17
      versionCode 1
      versionName "1.0"
   }
  </code></pre>
  
  <p>However, after syncrhonizing my app, and attempting to run, my AVD screen looks like this: 
  <img src="https://i.stack.imgur.com/EQxvy.png" alt="enter image description here"></p>
  
  <p>So neither my s5 plugged via USB running what I believe is 4.2.2 and the emulator that is minimum SDK (assuming 21 is in fact above 20 L) are compatabile.  But I still want to lower the minimum sdk so I can use my phone and not rely on emulators for now. </p>
  
  <p>The AndroidManifest in the /build/ folder looks like this:</p>
  
  <pre><code>&lt;uses-sdk
      android:maxSdkVersion="21"
      android:minSdkVersion="L"
      android:targetSdkVersion="L" /&gt;
  </code></pre>
  
  <p>Update: my compile options within build.gradle
  My dependency options for build.gradle are: </p>
  
  <pre><code>dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      //compile 'com.google.android.gms:play-services:4.2.42'
      //compile 'com.android.support:appcompat-v7:21.+'
  }
  </code></pre>