title: INSTALL_FAILED_OLDER_SDK in Android P Preview
body: <p>I'm trying to implement newer android sdk in my app, but it fails with : </p>
  
  <p><code>INSTALL_FAILED_OLDER_SDK:Failed to parse during installpacageLi at binary xml line 8 : Requires development Platform P but this is a release platform</code></p>
  
  <pre><code>compileSdkVersion 'android-P'
          defaultConfig {
              applicationId "example"
              minSdkVersion 16
              targetSdkVersion 'P'
              versionCode 223
              versionName '2.2.3-BETA'
              //testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
              vectorDrawables.useSupportLibrary = true
          }
  </code></pre>
  
  <p>I have tried : Clean Project , Rebuild , Clean gradle cache and restart ...
  Any idea ?</p>