title: SecurityException: Failed to find provider null for user 0; on ActiveAndroid on Android 8.0
body: <p>I have an app that is using ActiveAndroid and it's been working fine.  However; now when I try to save a model to the database I'm getting a SecurityException. </p>
  
  <p>The stack is:</p>
  
  <pre><code>Error saving model java.lang.SecurityException: Failed to find provider null for user 0; expected to find a valid ContentProvider for this authority 
  at android.os.Parcel.readException(Parcel.java:1942) 
  at android.os.Parcel.readException(Parcel.java:1888) 
  at android.content.IContentService$Stub$Proxy.notifyChange(IContentService.java:801) 
  at android.content.ContentResolver.notifyChange(ContentResolver.java:2046) 
  at android.content.ContentResolver.notifyChange(ContentResolver.java:1997) 
  at android.content.ContentResolver.notifyChange(ContentResolver.java:1967) 
  at com.activeandroid.Model.save(Model.java:162)
  [.... local stack removed]
  </code></pre>
  
  <p>Has anyone else experienced this?  Do we need to specify the <em>Content Provider</em> in the <em>AndroidManifest.xml</em>? </p>
  
  <p>Sorry but I do not have an isolated example of this yet.  I will work to put something together.</p>
  
  <p>Thanks in advance</p>